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+ |\^/| Maple 7 (IBM INTEL LINUX)
+._|\| |/|_. Copyright (c) 2001 by Waterloo Maple Inc.
+ \ MAPLE / All rights reserved. Maple is a registered trademark of
+ <____ ____> Waterloo Maple Inc.
+ | Type ? for help.
+# util.maple -- misc utility routines
+# $Header: /cactusdevcvs/CactusBase/LocalInterp/src/GeneralizedPolynomial-Uniform/util.maple,v 1.5 2002/09/02 10:21:03 jthorn Exp $
+>
+#
+# fix_rationals - convert numbers to RATIONAL() calls
+# nonmatching_names - find names in a list which *don't* have a specified prefix
+# sprint_numeric_list - convert a numeric list to a valid C identifier suffix
+# print_name_list_dcl - print C declarations for a list of names
+#
+# hypercube_points - compute all (integer) points in an N-dimensional hypercube
+#
+# ftruncate - truncate a file to zero length
+#
+>
+################################################################################
+################################################################################
+################################################################################
+>
+#
+# This function converts all {integer, rational} subexpressions of its
+# input except integer exponents and -1 factors in products, into function
+# calls
+# RATIONAL(num,den)
+# This is useful in conjunction with the C() library function, since
+#
+# C( (1/3) * foo * bar )
+# t0 = foo*bar/3;
+#
+# generates a (slow) division (and runs the risk of mixed-mode-arithmetic
+# problems), while
+#
+# C((1.0/3.0) * foo * bar);
+# t0 = 0.3333333333*foo*bar;
+#
+# suffers from roundoff error. With this function,
+#
+# fix_rationals((1/3) * foo * bar);
+# RATIONAL(1,3) foo bar
+# C(%);
+# t0 = RATIONAL(1.0,3.0)*foo*bar;
+#
+# which a C preprocessor macro can easily convert to the desired
+#
+# t0 = (1.0/3.0)*foo*bar;
+#
+# Additionally, this function can be told to leave certain types of
+# subexpressions unconverged. For example,
+# fix_rationals(expr, type, specfunc(integer, DATA));
+# will leave all subexpressions of the form DATA(integer arguments)
+# unconverted.
+#
+# Arguments:
+# expr = (in) The expression to be converted.
+# inert_fn = (optional in)
+# If specified, this argument should be a Boolean procedure
+# or the name of a Boolean procedure. This procedure should
+# take one or more argument, and return true if and only if
+# the first argument should *not* be converted, i.e. if we
+# should leave this expression unchanged. See the last
+# example above.
+# ... = (optional in)
+# Any further arguments are passed as additional arguments to
+# the inert_fn procedure.
+#
+> fix_rationals :=
+> proc(
+> expr::{
+> algebraic, name = algebraic,
+> list({algebraic, name = algebraic}),
+> set ({algebraic, name = algebraic})
+> },
+> inert_fn::{name, procedure}
+> )
+> local nn, k,
+> base, power, fbase, fpower,
+> fn, fn_args_list,
+> num, den, mult;
+>
+# do we want to convert this expression?
+> if ((nargs >= 2) and inert_fn(expr, args[3..nargs]))
+> then return expr;
+> end if;
+>
+# recurse over lists and sets
+> if (type(expr, {list,set}))
+> then return map(fix_rationals, expr, args[2..nargs]);
+> end if;
+>
+# recurse over equation right hand sides
+> if (type(expr, name = algebraic))
+> then return ( lhs(expr) = fix_rationals(rhs(expr), args[2..nargs]) );
+> end if;
+>
+# recurse over functions other than RATIONAL()
+> if (type(expr, function))
+> then
+> fn := op(0, expr);
+> if (fn <> 'RATIONAL')
+> then
+> fn_args_list := [op(expr)];
+> fn_args_list := map(fix_rationals, fn_args_list, args[2..nargs]);
+> fn; return '%'( op(fn_args_list) );
+> end if;
+> end if;
+>
+> nn := nops(expr);
+>
+# recurse over sums
+> if (type(expr, `+`))
+> then return sum('fix_rationals(op(k,expr), args[2..nargs])', 'k'=1..nn);
+> end if;
+>
+# recurse over products
+# ... leaving leading -1 factors intact, i.e. not converted to RATIONAL(-1,1)
+> if (type(expr, `*`))
+> then
+> if (op(1, expr) = -1)
+> then return -1*fix_rationals(remove(type, expr, 'identical(-1)'),
+> args[2..nargs]);
+> else return product('fix_rationals(op(k,expr), args[2..nargs])',
+> 'k'=1..nn);
+> end if;
+> end if;
+>
+# recurse over powers
+# ... leaving integer exponents intact
+> if (type(expr, `^`))
+> then
+> base := op(1, expr);
+> power := op(2, expr);
+>
+> fbase := fix_rationals(base, args[2..nargs]);
+> if (type(power, integer))
+> then fpower := power;
+> else fpower := fix_rationals(power, args[2..nargs]);
+> end if;
+> return fbase ^ fpower;
+> end if;
+>
+# fix integers and fractions
+> if (type(expr, integer))
+> then return 'RATIONAL'(expr, 1);
+> end if;
+> if (type(expr, fraction))
+> then
+> num := op(1, expr);
+> den := op(2, expr);
+>
+> return 'RATIONAL'(num, den);
+> end if;
+>
+# turn Maple floating-point into integer fraction, then recursively fix that
+> if (type(expr, float))
+> then
+> mult := op(1, expr);
+> power := op(2, expr);
+> return fix_rationals(mult * 10^power, args[2..nargs]);
+> end if;
+>
+# identity op on names
+> if (type(expr, name))
+> then return expr;
+> end if;
+>
+# unknown type
+> error "%0",
+> "unknown type for expr!",
+> " whattype(expr) = ", whattype(expr),
+> " expr = ", expr;
+> end proc;
+fix_rationals := proc(expr::{algebraic, name = algebraic,
+list({algebraic, name = algebraic}), set({algebraic, name = algebraic})},
+inert_fn::{procedure, name})
+local nn, k, base, power, fbase, fpower, fn, fn_args_list, num, den, mult;
+ if 2 <= nargs and inert_fn(expr, args[3 .. nargs]) then return expr
+ end if;
+ if type(expr, {set, list}) then
+ return map(fix_rationals, expr, args[2 .. nargs])
+ end if;
+ if type(expr, name = algebraic) then
+ return lhs(expr) = fix_rationals(rhs(expr), args[2 .. nargs])
+ end if;
+ if type(expr, function) then
+ fn := op(0, expr);
+ if fn <> 'RATIONAL' then
+ fn_args_list := [op(expr)];
+ fn_args_list :=
+ map(fix_rationals, fn_args_list, args[2 .. nargs]);
+ fn;
+ return '%'(op(fn_args_list))
+ end if
+ end if;
+ nn := nops(expr);
+ if type(expr, `+`) then return
+ sum('fix_rationals(op(k, expr), args[2 .. nargs])', 'k' = 1 .. nn)
+ end if;
+ if type(expr, `*`) then
+ if op(1, expr) = -1 then return -fix_rationals(
+ remove(type, expr, 'identical(-1)'), args[2 .. nargs])
+ else return product('fix_rationals(op(k, expr), args[2 .. nargs])',
+ 'k' = 1 .. nn)
+ end if
+ end if;
+ if type(expr, `^`) then
+ base := op(1, expr);
+ power := op(2, expr);
+ fbase := fix_rationals(base, args[2 .. nargs]);
+ if type(power, integer) then fpower := power
+ else fpower := fix_rationals(power, args[2 .. nargs])
+ end if;
+ return fbase^fpower
+ end if;
+ if type(expr, integer) then return 'RATIONAL'(expr, 1) end if;
+ if type(expr, fraction) then
+ num := op(1, expr); den := op(2, expr); return 'RATIONAL'(num, den)
+ end if;
+ if type(expr, float) then
+ mult := op(1, expr);
+ power := op(2, expr);
+ return fix_rationals(mult*10^power, args[2 .. nargs])
+ end if;
+ if type(expr, name) then return expr end if;
+ error "%0", "unknown type for expr!", " whattype(expr) = ",
+ whattype(expr), " expr = ", expr
+end proc
+
+>
+################################################################################
+>
+#
+# This function finds names in a list which *don't* have a specified prefix.
+#
+# Arguments:
+# name_list = A list of the names.
+# prefix = The prefix we want to filter out.
+#
+# Results:
+# This function returns the subset list of names which don't have the
+# specified prefix.
+#
+> nonmatching_names :=
+> proc( name_list::list({name,string}), prefix::{name,string} )
+>
+> select( proc(n)
+> evalb(not StringTools[IsPrefix](prefix,n));
+> end proc
+> ,
+> name_list
+> );
+> end proc;
+nonmatching_names := proc(
+name_list::list({name, string}), prefix::{name, string})
+ select(proc(n) evalb(not StringTools[IsPrefix](prefix, n)) end proc,
+ name_list)
+end proc
+
+>
+################################################################################
+>
+#
+# This function converts a numeric list to a string which is a valid
+# C identifier suffix: elements are separated by "_", decimal points are
+# replaced by "x", and all nonzero values have explicit +/- signs, which
+# are replaced by "p"/"m".
+#
+# For example, [0,-3.5,+4] --> "0_m3x5_p4".
+#
+> sprint_numeric_list :=
+> proc(nlist::list(numeric))
+>
+# generate preliminary string, eg "+0_-3.5_+4"
+> map2(sprintf, "%+a", nlist);
+> ListTools[Join](%, "_");
+> cat(op(%));
+>
+# fixup bad characters
+> StringTools[SubstituteAll](%, "+0", "0");
+> StringTools[CharacterMap](".+-", "xpm", %);
+>
+> return %;
+> end proc;
+sprint_numeric_list := proc(nlist::list(numeric))
+ map2(sprintf, "%+a", nlist);
+ ListTools[Join](%, "_");
+ cat(op(%));
+ StringTools[SubstituteAll](%, "+0", "0");
+ StringTools[CharacterMap](".+-", "xpm", %);
+ return %
+end proc
+
+>
+################################################################################
+>
+#
+# This function prints a sequence of C declarations for a list of names.
+#
+# Argument:
+# name_list = A list of the names.
+# type_name = The C type of the names, eg. "double".
+# file_name = The file name to write the declaration to. This is
+# truncated before writing.
+#
+> print_name_list_dcl :=
+> proc( name_list::list({name,string}),
+> type_name::string,
+> file_name::string )
+> local blanks, separator_string;
+>
+> ftruncate(file_name);
+>
+> map(
+> proc(var::{name,string})
+> fprintf(file_name,
+> "%s %s;\n",
+> type_name, var);
+> end proc
+> ,
+> name_list
+> );
+>
+> fclose(file_name);
+> NULL;
+> end proc;
+print_name_list_dcl := proc(
+name_list::list({name, string}), type_name::string, file_name::string)
+local blanks, separator_string;
+ ftruncate(file_name);
+ map(proc(var::{name, string})
+ fprintf(file_name, "%s %s;\n", type_name, var)
+ end proc, name_list);
+ fclose(file_name);
+ NULL
+end proc
+
+>
+################################################################################
+################################################################################
+################################################################################
+>
+#
+# This function computes a list of all the (integer) points in an
+# N-dimensional hypercube, in lexicographic order. The present
+# implementation requires N <= 4.
+#
+# Arguments:
+# cmin,cmax = N-element lists of cube minimum/maximum coordinates.
+#
+# Results:
+# The function returns a set of d-element lists giving the coordinates.
+# For example,
+# hypercube([0,0], [2,1]
+# returns
+# { [0,0], [0,1], [1,0], [1,1], [2,0], [2,1] }
+> hypercube_points :=
+> proc(cmin::list(integer), cmax::list(integer))
+> local N, i,j,k,l;
+>
+> N := nops(cmin);
+> if (nops(cmax) <> N)
+> then error
+> "must have same number of dimensions for min and max coordinates!";
+> fi;
+>
+> if (N = 1)
+> then return [seq([i], i=cmin[1]..cmax[1])];
+> elif (N = 2)
+> then return [
+> seq(
+> seq([i,j], j=cmin[2]..cmax[2]),
+> i=cmin[1]..cmax[1])
+> ];
+> elif (N = 3)
+> then return [
+> seq(
+> seq(
+> seq([i,j,k], k=cmin[3]..cmax[3]),
+> j=cmin[2]..cmax[2] ),
+> i=cmin[1]..cmax[1])
+> ];
+> elif (N = 4)
+> then return [
+> seq(
+> seq(
+> seq(
+> seq([i,j,k,l], l=cmin[4]..cmax[4]),
+> k=cmin[3]..cmax[3] ),
+> j=cmin[2]..cmax[2]),
+> i=cmin[1]..cmax[1])
+> ];
+> else
+> error "implementation restriction: must have N <= 4, got %1!", N;
+> fi;
+> end proc;
+hypercube_points := proc(cmin::list(integer), cmax::list(integer))
+local N, i, j, k, l;
+ N := nops(cmin);
+ if nops(cmax) <> N then error
+ "must have same number of dimensions for min and max coordinates!"
+ end if;
+ if N = 1 then return [seq([i], i = cmin[1] .. cmax[1])]
+ elif N = 2 then return
+ [seq(seq([i, j], j = cmin[2] .. cmax[2]), i = cmin[1] .. cmax[1])]
+ elif N = 3 then return [seq(
+ seq(seq([i, j, k], k = cmin[3] .. cmax[3]), j = cmin[2] .. cmax[2])
+ , i = cmin[1] .. cmax[1])]
+ elif N = 4 then return [seq(seq(seq(
+ seq([i, j, k, l], l = cmin[4] .. cmax[4]), k = cmin[3] .. cmax[3]),
+ j = cmin[2] .. cmax[2]), i = cmin[1] .. cmax[1])]
+ else error "implementation restriction: must have N <= 4, got %1!", N
+ end if
+end proc
+
+>
+################################################################################
+################################################################################
+################################################################################
+>
+#
+# This function truncates a file to 0 length if it exists, or creates
+# it at that length if it doesn't exist.
+#
+# Arguments:
+# file_name = (in) The name of the file.
+#
+> ftruncate :=
+> proc(file_name::string)
+> fopen(file_name, 'WRITE');
+> fclose(%);
+> NULL;
+> end proc;
+ftruncate :=
+
+ proc(file_name::string) fopen(file_name, 'WRITE'); fclose(%); NULL end proc
+
+# interpolate.maple -- compute interpolation formulas/coefficients
+# $Header: /cactusdevcvs/CactusBase/LocalInterp/src/GeneralizedPolynomial-Uniform/interpolate.maple,v 1.11 2002/09/02 10:21:02 jthorn Exp $
+>
+#
+# <<<representation of numbers, data values, etc>>>
+# Lagrange_polynomial_interpolant - compute Lagrange polynomial interpolant
+# Hermite_polynomial_interpolant - compute Hermite polynomial interpolant
+# coeffs_as_lc_of_data - coefficients of ... (linear combination of data)
+#
+# print_coeffs__lc_of_data - print C code to compute coefficients
+# print_fetch_data - print C code to fetch input array chunk into struct data
+# print_store_coeffs - print C code to store struct coeffs "somewhere"
+# print_interp_cmpt__lc_of_data - print C code for computation of interpolant
+#
+# coeff_name - name of coefficient of data at a given [m] coordinate
+# data_var_name - name of variable storing data value at a given [m] coordinate
+#
+>
+################################################################################
+>
+#
+# ***** representation of numbers, data values, etc *****
+#
+# We use RATIONAL(p.0,q.0) to denote the rational number p/q.
+#
+# We use DATA(...) to represent the data values being interpolated at a
+# specified [m] coordinate, where the arguments are the [m] coordinates.
+#
+# We use COEFF(...) to represent the molecule coefficient at a specified
+# [m] coordinate, where the arguments are the [m] coordinates.
+#
+# For example, the usual 1-D centered 2nd order 1st derivative molecule
+# would be written
+# RATIONAL(-1.0,2.0)*DATA(-1) + RATIONA(1.0,2.0)*DATA(1)
+# and its coefficients as
+# COEFF(-1) = RATIONAL(-1.0,2.0)
+# COEFF(1) = RATIONAL(1.0,2.0)
+#
+>
+################################################################################
+################################################################################
+################################################################################
+>
+#
+# This function computes a Lagrange polynomial interpolant in any
+# number of dimensions.
+#
+# Arguments:
+# fn = The interpolation function. This should be a procedure in the
+# coordinates, having the coefficients as global variables. For
+# example,
+# proc(x,y) c00 + c10*x + c01*y end proc
+# coeff_list = A set of the interpolation coefficients (coefficients in
+# the interpolation function), for example [c00, c10, c01].
+# coord_list = A list of the coordinates (independent variables in the
+# interpolation function), for example [x,y].
+# posn_list = A list of positions (each a list of numeric values) where the
+# interpolant is to use data, for example hypercube([0,0], [1,1]).
+# Any positions may be used; if they're redundant (as in the
+# example) the least-squares interpolant is computed.
+#
+# Results:
+# This function returns the interpolating polynomial, in the form of
+# an algebraic expression in the coordinates and the data values.
+#
+> Lagrange_polynomial_interpolant :=
+> proc(
+> fn::procedure, coeff_list::list(name),
+> coord_list::list(name), posn_list::list(list(numeric))
+> )
+> local posn, data_eqns, coeff_eqns;
+>
+# coefficients of interpolating polynomial
+> data_eqns := { seq( fn(op(posn))='DATA'(op(posn)) , posn=posn_list ) };
+> coeff_eqns := linalg[leastsqrs](data_eqns, {op(coeff_list)});
+> if (has(coeff_eqns, '_t'))
+> then error "interpolation coefficients aren't uniquely determined!";
+> end if;
+>
+# interpolant as a polynomial in the coordinates
+> return subs(coeff_eqns, eval(fn))(op(coord_list));
+> end proc;
+Lagrange_polynomial_interpolant := proc(fn::procedure, coeff_list::list(name),
+coord_list::list(name), posn_list::list(list(numeric)))
+local posn, data_eqns, coeff_eqns;
+ data_eqns := {seq(fn(op(posn)) = 'DATA'(op(posn)), posn = posn_list)};
+ coeff_eqns := linalg[leastsqrs](data_eqns, {op(coeff_list)});
+ if has(coeff_eqns, '_t') then
+ error "interpolation coefficients aren't uniquely determined!"
+ end if;
+ return subs(coeff_eqns, eval(fn))(op(coord_list))
+end proc
+
+>
+################################################################################
+>
+#
+# This function computes a Hermite polynomial interpolant in any
+# number of dimensions. This is a polynomial which
+# * has values which match the given data DATA() at a specified set of
+# points, and
+# * has derivatives which match the specified finite-difference derivatives
+# of the given data DATA() at a specified set of points
+#
+# For the derivative matching, we actually match all possible products
+# of 1st derivatives, i.e. in 2-D we match dx, dy, and dxy, in 3-D we
+# match dx, dy, dz, dxy, dxz, dyz, and dxyz, etc etc.
+#
+# Arguments:
+# fn = The interpolation function. This should be a procedure in the
+# coordinates, having the coefficients as global variables. For
+# example,
+# proc(x,y)
+# + c03*y^3 + c13*x*y^3 + c23*x^2*y^3 + c33*x^3*y^3
+# + c02*y^2 + c12*x*y^2 + c22*x^2*y^2 + c32*x^3*y^2
+# + c01*y + c11*x*y + c21*x^2*y + c31*x^3*y
+# + c00 + c10*x + c20*x^2 + c30*x^3
+# end proc;
+# coeff_set = A set of the interpolation coefficients (coefficients in
+# the interpolation function), for example
+# {
+# c03, c13, c23, c33,
+# c02, c12, c22, c32,
+# c01, c11, c21, c31,
+# c00, c10, c20, c30
+# }
+# coord_list = A list of the coordinates (independent variables in the
+# interpolation function), for example [x,y].
+# deriv_set = A set of equations of the form
+# {coords} = proc
+# giving the derivatives which are to be matched, and the
+# procedures to compute their finite-difference approximations.
+# Each procedure should take N_dims integer arguments specifying
+# an evaluation point, and return a suitable linear combination
+# of the DATA() for the derivative at that point. For example
+# {
+# {x} = proc(i::integer, j::integer)
+# - 1/2*DATA(i-1,j) + 1/2*DATA(i+1,j)
+# end proc
+# ,
+# {y} = proc(i::integer, j::integer)
+# - 1/2*DATA(i,j-1) + 1/2*DATA(i,j+1)
+# end proc
+# ,
+# {x,y} = proc(i::integer, j::integer)
+# - 1/4*DATA(i-1,j+1) + 1/4*DATA(i+1,j+1)
+# + 1/4*DATA(i-1,j-1) - 1/4*DATA(i+1,j-1)
+# end proc
+# }
+# fn_posn_set = A set of positions (each a list of numeric values)
+# where the interpolant is to match the given data DATA(),
+# for example
+# {[0,0], [0,1], [1,0], [1,1]}
+# deriv_posn_set = A list of positions (each a list of numeric values)
+# where the interpolant is to match the derivatives
+# specified by deriv_set , for example
+# {[0,0], [0,1], [1,0], [1,1]}
+#
+# Results:
+# This function returns the interpolating polynomial, in the form of
+# an algebraic expression in the coordinates and the data values.
+#
+> Hermite_polynomial_interpolant :=
+> proc(
+> fn::procedure,
+> coeff_set::set(name),
+> coord_list::list(name),
+> deriv_set::set(set(name) = procedure),
+> fn_posn_set::set(list(numeric)),
+> deriv_posn_set::set(list(numeric))
+> )
+> local fn_eqnset, deriv_eqnset, coeff_eqns, subs_eqnset;
+>
+>
+#
+# compute a set of equations
+# {fn(posn) = DATA(posn)}
+# giving the function values to be matched
+#
+> fn_eqnset := map(
+> # return equation that fn(posn) = DATA(posn)
+> proc(posn::list(integer))
+> fn(op(posn)) = 'DATA'(op(posn));
+> end proc
+> ,
+> fn_posn_set
+> );
+>
+>
+#
+# compute a set of equations
+# { diff(fn,coords)(posn) = DERIV(coords)(posn) }
+# giving the derivative values to be matched, where DERIV(coords)
+# is a placeholder for the appropriate derivative
+#
+> map(
+> # return set of equations for this particular derivative
+> proc(deriv_coords::set(name))
+> local deriv_fn;
+> fn(op(coord_list));
+> diff(%, op(deriv_coords));
+> deriv_fn := unapply(%, op(coord_list));
+> map(
+> proc(posn::list(integer))
+> deriv_fn(op(posn)) = 'DERIV'(op(deriv_coords))(op(posn));
+> end proc
+> ,
+> deriv_posn_set
+> );
+> end proc
+> ,
+> map(lhs, deriv_set)
+> );
+> deriv_eqnset := `union`(op(%));
+>
+>
+#
+# solve overall set of equations for coefficients
+# in terms of DATA() and DERIV() values
+#
+> coeff_eqns := solve[linear](fn_eqnset union deriv_eqnset, coeff_set);
+> if (indets(map(rhs,%)) <> {})
+> then error "no unique solution for coefficients -- %1 eqns for %2 coeffs",
+> nops(fn_eqnset union deriv_eqnset),
+> nops(coeff_set);
+> fi;
+>
+>
+#
+# compute a set of substitution equations
+# {'DERIV'(coords) = procedure}
+#
+> subs_eqnset := map(
+> proc(eqn::set(name) = procedure)
+> 'DERIV'(op(lhs(eqn))) = rhs(eqn);
+> end proc
+> ,
+> deriv_set
+> );
+>
+>
+#
+# compute the coefficients in terms of the DATA() values
+#
+> subs(subs_eqnset, coeff_eqns);
+> eval(%);
+>
+#
+# compute the interpolant as a polynomial in the coordinates
+#
+> subs(%, fn(op(coord_list)));
+> end proc;
+Hermite_polynomial_interpolant := proc(fn::procedure, coeff_set::set(name),
+coord_list::list(name), deriv_set::set(set(name) = procedure),
+fn_posn_set::set(list(numeric)), deriv_posn_set::set(list(numeric)))
+local fn_eqnset, deriv_eqnset, coeff_eqns, subs_eqnset;
+ fn_eqnset := map(
+ proc(posn::list(integer)) fn(op(posn)) = 'DATA'(op(posn)) end proc,
+ fn_posn_set);
+ map(proc(deriv_coords::set(name))
+ local deriv_fn;
+ fn(op(coord_list));
+ diff(%, op(deriv_coords));
+ deriv_fn := unapply(%, op(coord_list));
+ map(proc(posn::list(integer))
+ deriv_fn(op(posn)) =
+ 'DERIV'(op(deriv_coords))(op(posn))
+ end proc, deriv_posn_set)
+ end proc, map(lhs, deriv_set));
+ deriv_eqnset := `union`(op(%));
+ coeff_eqns := solve[linear](fn_eqnset union deriv_eqnset, coeff_set);
+ if indets(map(rhs, %)) <> {} then error
+ "no unique solution for coefficients -- %1 eqns for %2 coeffs",
+ nops(fn_eqnset union deriv_eqnset), nops(coeff_set)
+ end if;
+ subs_eqnset := map(proc(eqn::(set(name) = procedure))
+ 'DERIV'(op(lhs(eqn))) = rhs(eqn)
+ end proc, deriv_set);
+ subs(subs_eqnset, coeff_eqns);
+ eval(%);
+ subs(%, fn(op(coord_list)))
+end proc
+
+>
+################################################################################
+>
+#
+# This function takes as input an interpolating polynomial, expresses
+# it as a linear combination of the data values, and returns the coefficeints
+# of that form.
+#
+# Arguments:
+# interpolant = The interpolating polynomial (an algebraic expression
+# in the coordinates and the data values).
+# posn_list = The same list of data positions used in the interpolant.
+#
+# Results:
+# This function returns the coefficients, as a list of equations of the
+# form COEFF(...) = value , where each value is a polynomial in the
+# coordinates. The order of the list matches that of posn_list.
+#
+> coeffs_as_lc_of_data :=
+> proc(
+> interpolant::algebraic,
+> posn_list::list(list(numeric))
+> )
+> local data_list, interpolant_as_lc_of_data;
+>
+# interpolant as a linear combination of the data values
+> data_list := [ seq( 'DATA'(op(posn)) , posn=posn_list ) ];
+> interpolant_as_lc_of_data := collect(interpolant, data_list);
+>
+# coefficients of the data values in the linear combination
+> return map(
+> proc(posn::list(numeric))
+> coeff(interpolant_as_lc_of_data, DATA(op(posn)));
+> 'COEFF'(op(posn)) = %;
+> end proc
+> ,
+> posn_list
+> );
+> end proc;
+coeffs_as_lc_of_data := proc(
+interpolant::algebraic, posn_list::list(list(numeric)))
+local data_list, interpolant_as_lc_of_data;
+ data_list := [seq('DATA'(op(posn)), posn = posn_list)];
+ interpolant_as_lc_of_data := collect(interpolant, data_list);
+ return map(proc(posn::list(numeric))
+ coeff(interpolant_as_lc_of_data, DATA(op(posn)));
+ 'COEFF'(op(posn)) = %
+ end proc, posn_list)
+end proc
+
+>
+################################################################################
+################################################################################
+################################################################################
+>
+#
+# This function prints C expressions for the coefficients of an
+# interpolating polynomial. (The polynomial is expressed as linear
+# combinations of the data values with coefficients which are
+# RATIONAL(p,q) calls.)
+#
+# Arguments:
+# coeff_list = A list of the coefficients, as returned from
+# coeffs_as_lc_of_data() .
+# coeff_name_prefix = A prefix string for the coefficient names.
+# temp_name_type = The C type to be used for Maple-introduced temporary
+# names, eg. "double".
+# file_name = The file name to write the coefficients to. This is
+# truncated before writing.
+#
+> print_coeffs__lc_of_data :=
+> proc( coeff_list::list(specfunc(numeric,COEFF) = algebraic),
+> coeff_name_prefix::string,
+> temp_name_type::string,
+> file_name::string )
+> global `codegen/C/function/informed`;
+> local coeff_list2, cmpt_list, temp_name_list;
+>
+# convert LHS of each equation from a COEFF() call (eg COEFF(-1,+1))
+# to a Maple/C variable name (eg coeff_I_m1_p1)
+> coeff_list2 := map(
+> proc(coeff_eqn::specfunc(numeric,COEFF) = algebraic)
+> local posn;
+> posn := [op(lhs(coeff_eqn))];
+> coeff_name(posn,coeff_name_prefix);
+> convert(%, name); # codegen[C] wants LHS
+> # to be an actual Maple *name*
+> % = fix_rationals(rhs(coeff_eqn));
+> end proc
+> ,
+> coeff_list
+> );
+>
+#
+# generate the C code
+#
+>
+# tell codegen[C] not to warn about unknown RATIONAL() and DATA() "fn calls"
+# via undocumented :( global table
+> `codegen/C/function/informed`['RATIONAL'] := true;
+> `codegen/C/function/informed`['DATA'] := true;
+>
+> ftruncate(file_name);
+>
+# optimized computation sequence for all the coefficients
+# (may use local variables t0,t1,t2,...)
+> cmpt_list := [codegen[optimize](coeff_list2, tryhard)];
+>
+# list of the t0,t1,t2,... local variables
+> temp_name_list := nonmatching_names(map(lhs,cmpt_list), coeff_name_prefix);
+>
+# declare the t0,t1,t2,... local variables (if there are any)
+> if (nops(temp_name_list) > 0)
+> then print_name_list_dcl(%, temp_name_type, file_name);
+> fi;
+>
+# now print the optimized computation sequence
+> codegen[C](cmpt_list, filename=file_name);
+>
+> fclose(file_name);
+>
+> NULL;
+> end proc;
+print_coeffs__lc_of_data := proc(
+coeff_list::list(specfunc(numeric, COEFF) = algebraic),
+coeff_name_prefix::string, temp_name_type::string, file_name::string)
+local coeff_list2, cmpt_list, temp_name_list;
+global `codegen/C/function/informed`;
+ coeff_list2 := map(proc(
+ coeff_eqn::(specfunc(numeric, COEFF) = algebraic))
+ local posn;
+ posn := [op(lhs(coeff_eqn))];
+ coeff_name(posn, coeff_name_prefix);
+ convert(%, name);
+ % = fix_rationals(rhs(coeff_eqn))
+ end proc, coeff_list);
+ `codegen/C/function/informed`['RATIONAL'] := true;
+ `codegen/C/function/informed`['DATA'] := true;
+ ftruncate(file_name);
+ cmpt_list := [codegen[optimize](coeff_list2, tryhard)];
+ temp_name_list :=
+ nonmatching_names(map(lhs, cmpt_list), coeff_name_prefix);
+ if 0 < nops(temp_name_list) then
+ print_name_list_dcl(%, temp_name_type, file_name)
+ end if;
+ codegen[C](cmpt_list, filename = file_name);
+ fclose(file_name);
+ NULL
+end proc
+
+>
+################################################################################
+>
+#
+# This function prints a sequence of C expression to assign the data-value
+# variables, eg
+# data->data_m1_p1 = DATA(-1,1);
+#
+# Arguments:
+# posn_list = The same list of positions as was used to compute the
+# interpolating polynomial.
+# data_var_name_prefix = A prefix string for the data variable names.
+# file_name = The file name to write the coefficients to. This is
+# truncated before writing.
+#
+> print_fetch_data :=
+> proc(
+> posn_list::list(list(numeric)),
+> data_var_name_prefix::string,
+> file_name::string
+> )
+>
+> ftruncate(file_name);
+> map(
+> proc(posn::list(numeric))
+> fprintf(file_name,
+> "%s = %a;\n",
+> data_var_name(posn,data_var_name_prefix),
+> DATA(op(posn)));
+> end proc
+> ,
+> posn_list
+> );
+> fclose(file_name);
+>
+> NULL;
+> end proc;
+print_fetch_data := proc(posn_list::list(list(numeric)),
+data_var_name_prefix::string, file_name::string)
+ ftruncate(file_name);
+ map(proc(posn::list(numeric))
+ fprintf(file_name, "%s = %a;\n",
+ data_var_name(posn, data_var_name_prefix), DATA(op(posn)))
+ end proc, posn_list);
+ fclose(file_name);
+ NULL
+end proc
+
+>
+################################################################################
+>
+#
+# This function prints a sequence of C expression to store the interpolation
+# coefficients in COEFF(...) expressions, eg
+# COEFF(1,-1) = factor * coeffs->coeff_p1_m1;
+#
+# Arguments:
+# posn_list = The list of positions in the molecule.
+# coeff_name_prefix = A prefix string for the coefficient names,
+# eg "factor * coeffs->coeff_"
+# file_name = The file name to write the coefficients to. This is
+# truncated before writing.
+#
+> print_store_coeffs :=
+> proc(
+> posn_list::list(list(numeric)),
+> coeff_name_prefix::string,
+> file_name::string
+> )
+>
+> ftruncate(file_name);
+> map(
+> proc(posn::list(numeric))
+> fprintf(file_name,
+> "%a = %s;\n",
+> 'COEFF'(op(posn)),
+> coeff_name(posn,coeff_name_prefix));
+> end proc
+> ,
+> posn_list
+> );
+> fclose(file_name);
+>
+> NULL;
+> end proc;
+print_store_coeffs := proc(posn_list::list(list(numeric)),
+coeff_name_prefix::string, file_name::string)
+ ftruncate(file_name);
+ map(proc(posn::list(numeric))
+ fprintf(file_name, "%a = %s;\n", 'COEFF'(op(posn)),
+ coeff_name(posn, coeff_name_prefix))
+ end proc, posn_list);
+ fclose(file_name);
+ NULL
+end proc
+
+>
+################################################################################
+>
+#
+# This function prints a C expression to evaluate a molecule, i.e.
+# to compute the molecule as a linear combination of the data values.
+#
+# Arguments:
+# posn_list = The list of positions in the molecule.
+# coeff_name_prefix = A prefix string for the coefficient names.
+# data_var_name_prefix = A prefix string for the data variable names.
+# file_name = The file name to write the coefficients to. This is
+# truncated before writing.
+#
+> print_evaluate_molecule :=
+> proc(
+> posn_list::list(list(numeric)),
+> coeff_name_prefix::string,
+> data_var_name_prefix::string,
+> file_name::string
+> )
+>
+> ftruncate(file_name);
+>
+# list of "coeff*data_var" terms
+> map(
+> proc(posn::list(numeric))
+> sprintf("%s*%s",
+> coeff_name(posn,coeff_name_prefix),
+> data_var_name(posn,data_var_name_prefix));
+> end proc
+> ,
+> posn_list
+> );
+>
+> ListTools[Join](%, "\n + ");
+> cat(op(%));
+> fprintf(file_name, " %s;\n", %);
+>
+> fclose(file_name);
+>
+> NULL;
+> end proc;
+print_evaluate_molecule := proc(posn_list::list(list(numeric)),
+coeff_name_prefix::string, data_var_name_prefix::string, file_name::string)
+ ftruncate(file_name);
+ map(proc(posn::list(numeric))
+ sprintf("%s*%s", coeff_name(posn, coeff_name_prefix),
+ data_var_name(posn, data_var_name_prefix))
+ end proc, posn_list);
+ ListTools[Join](%, "\n + ");
+ cat(op(%));
+ fprintf(file_name, " %s;\n", %);
+ fclose(file_name);
+ NULL
+end proc
+
+>
+################################################################################
+################################################################################
+################################################################################
+>
+#
+# This function computes the name of the coefficient of the data at a
+# given [m] position, i.e. it encapsulates our naming convention for this.
+#
+# Arguments:
+# posn = (in) The [m] coordinates.
+# name_prefix = A prefix string for the coefficient name.
+#
+# Results:
+# The function returns the coefficient, as a Maple string.
+#
+> coeff_name :=
+> proc(posn::list(numeric), name_prefix::string)
+> cat(name_prefix, sprint_numeric_list(posn));
+> end proc;
+coeff_name := proc(posn::list(numeric), name_prefix::string)
+ cat(name_prefix, sprint_numeric_list(posn))
+end proc
+
+>
+################################################################################
+>
+#
+# This function computes the name of the variable in which the C code
+# will store the input data at a given [m] position, i.e. it encapsulates
+# our naming convention for this.
+#
+# Arguments:
+# posn = (in) The [m] coordinates.
+# name_prefix = A prefix string for the variable name.
+#
+# Results:
+# The function returns the variable name, as a Maple string.
+#
+> data_var_name :=
+> proc(posn::list(numeric), name_prefix::string)
+> cat(name_prefix, sprint_numeric_list(posn));
+> end proc;
+data_var_name := proc(posn::list(numeric), name_prefix::string)
+ cat(name_prefix, sprint_numeric_list(posn))
+end proc
+
+# Maple code to compute lists of point positions in hypercube-shaped molecules
+# $Header: /cactusdevcvs/CactusBase/LocalInterp/src/GeneralizedPolynomial-Uniform/common/cube_posns.maple,v 1.3 2002/08/20 16:56:41 jthorn Exp $
+>
+################################################################################
+>
+#
+# 1D interpolation points
+#
+> posn_list_1d_size2 := hypercube_points([ 0], [+1]);
+ posn_list_1d_size2 := [[0], [1]]
+
+> posn_list_1d_size3 := hypercube_points([-1], [+1]);
+ posn_list_1d_size3 := [[-1], [0], [1]]
+
+> posn_list_1d_size4 := hypercube_points([-1], [+2]);
+ posn_list_1d_size4 := [[-1], [0], [1], [2]]
+
+> posn_list_1d_size5 := hypercube_points([-2], [+2]);
+ posn_list_1d_size5 := [[-2], [-1], [0], [1], [2]]
+
+> posn_list_1d_size6 := hypercube_points([-2], [+3]);
+ posn_list_1d_size6 := [[-2], [-1], [0], [1], [2], [3]]
+
+> posn_list_1d_size7 := hypercube_points([-3], [+3]);
+ posn_list_1d_size7 := [[-3], [-2], [-1], [0], [1], [2], [3]]
+
+>
+################################################################################
+>
+#
+# 2D interpolation points (Fortran ordering)
+#
+> posn_list_2d_size2 := map(ListTools[Reverse],
+> hypercube_points([ 0, 0], [+1,+1]));
+ posn_list_2d_size2 := [[0, 0], [1, 0], [0, 1], [1, 1]]
+
+> posn_list_2d_size3 := map(ListTools[Reverse],
+> hypercube_points([-1,-1], [+1,+1]));
+posn_list_2d_size3 := [[-1, -1], [0, -1], [1, -1], [-1, 0], [0, 0], [1, 0],
+
+ [-1, 1], [0, 1], [1, 1]]
+
+> posn_list_2d_size4 := map(ListTools[Reverse],
+> hypercube_points([-1,-1], [+2,+2]));
+posn_list_2d_size4 := [[-1, -1], [0, -1], [1, -1], [2, -1], [-1, 0], [0, 0],
+
+ [1, 0], [2, 0], [-1, 1], [0, 1], [1, 1], [2, 1], [-1, 2], [0, 2], [1, 2],
+
+ [2, 2]]
+
+> posn_list_2d_size5 := map(ListTools[Reverse],
+> hypercube_points([-2,-2], [+2,+2]));
+posn_list_2d_size5 := [[-2, -2], [-1, -2], [0, -2], [1, -2], [2, -2], [-2, -1],
+
+ [-1, -1], [0, -1], [1, -1], [2, -1], [-2, 0], [-1, 0], [0, 0], [1, 0],
+
+ [2, 0], [-2, 1], [-1, 1], [0, 1], [1, 1], [2, 1], [-2, 2], [-1, 2], [0, 2],
+
+ [1, 2], [2, 2]]
+
+> posn_list_2d_size6 := map(ListTools[Reverse],
+> hypercube_points([-2,-2], [+3,+3]));
+posn_list_2d_size6 := [[-2, -2], [-1, -2], [0, -2], [1, -2], [2, -2], [3, -2],
+
+ [-2, -1], [-1, -1], [0, -1], [1, -1], [2, -1], [3, -1], [-2, 0], [-1, 0],
+
+ [0, 0], [1, 0], [2, 0], [3, 0], [-2, 1], [-1, 1], [0, 1], [1, 1], [2, 1],
+
+ [3, 1], [-2, 2], [-1, 2], [0, 2], [1, 2], [2, 2], [3, 2], [-2, 3], [-1, 3],
+
+ [0, 3], [1, 3], [2, 3], [3, 3]]
+
+>
+################################################################################
+>
+#
+# 3D interpolation points (Fortran ordering)
+#
+> posn_list_3d_size2 := map(ListTools[Reverse],
+> hypercube_points([ 0, 0, 0], [+1,+1,+1]));
+posn_list_3d_size2 := [[0, 0, 0], [1, 0, 0], [0, 1, 0], [1, 1, 0], [0, 0, 1],
+
+ [1, 0, 1], [0, 1, 1], [1, 1, 1]]
+
+> posn_list_3d_size3 := map(ListTools[Reverse],
+> hypercube_points([-1,-1,-1], [+1,+1,+1]));
+posn_list_3d_size3 := [[-1, -1, -1], [0, -1, -1], [1, -1, -1], [-1, 0, -1],
+
+ [0, 0, -1], [1, 0, -1], [-1, 1, -1], [0, 1, -1], [1, 1, -1], [-1, -1, 0],
+
+ [0, -1, 0], [1, -1, 0], [-1, 0, 0], [0, 0, 0], [1, 0, 0], [-1, 1, 0],
+
+ [0, 1, 0], [1, 1, 0], [-1, -1, 1], [0, -1, 1], [1, -1, 1], [-1, 0, 1],
+
+ [0, 0, 1], [1, 0, 1], [-1, 1, 1], [0, 1, 1], [1, 1, 1]]
+
+> posn_list_3d_size4 := map(ListTools[Reverse],
+> hypercube_points([-1,-1,-1], [+2,+2,+2]));
+posn_list_3d_size4 := [[-1, -1, -1], [0, -1, -1], [1, -1, -1], [2, -1, -1],
+
+ [-1, 0, -1], [0, 0, -1], [1, 0, -1], [2, 0, -1], [-1, 1, -1], [0, 1, -1],
+
+ [1, 1, -1], [2, 1, -1], [-1, 2, -1], [0, 2, -1], [1, 2, -1], [2, 2, -1],
+
+ [-1, -1, 0], [0, -1, 0], [1, -1, 0], [2, -1, 0], [-1, 0, 0], [0, 0, 0],
+
+ [1, 0, 0], [2, 0, 0], [-1, 1, 0], [0, 1, 0], [1, 1, 0], [2, 1, 0],
+
+ [-1, 2, 0], [0, 2, 0], [1, 2, 0], [2, 2, 0], [-1, -1, 1], [0, -1, 1],
+
+ [1, -1, 1], [2, -1, 1], [-1, 0, 1], [0, 0, 1], [1, 0, 1], [2, 0, 1],
+
+ [-1, 1, 1], [0, 1, 1], [1, 1, 1], [2, 1, 1], [-1, 2, 1], [0, 2, 1],
+
+ [1, 2, 1], [2, 2, 1], [-1, -1, 2], [0, -1, 2], [1, -1, 2], [2, -1, 2],
+
+ [-1, 0, 2], [0, 0, 2], [1, 0, 2], [2, 0, 2], [-1, 1, 2], [0, 1, 2],
+
+ [1, 1, 2], [2, 1, 2], [-1, 2, 2], [0, 2, 2], [1, 2, 2], [2, 2, 2]]
+
+> posn_list_3d_size5 := map(ListTools[Reverse],
+> hypercube_points([-2,-2,-2], [+2,+2,+2]));
+posn_list_3d_size5 := [[-2, -2, -2], [-1, -2, -2], [0, -2, -2], [1, -2, -2],
+
+ [2, -2, -2], [-2, -1, -2], [-1, -1, -2], [0, -1, -2], [1, -1, -2],
+
+ [2, -1, -2], [-2, 0, -2], [-1, 0, -2], [0, 0, -2], [1, 0, -2], [2, 0, -2],
+
+ [-2, 1, -2], [-1, 1, -2], [0, 1, -2], [1, 1, -2], [2, 1, -2], [-2, 2, -2],
+
+ [-1, 2, -2], [0, 2, -2], [1, 2, -2], [2, 2, -2], [-2, -2, -1], [-1, -2, -1],
+
+ [0, -2, -1], [1, -2, -1], [2, -2, -1], [-2, -1, -1], [-1, -1, -1],
+
+ [0, -1, -1], [1, -1, -1], [2, -1, -1], [-2, 0, -1], [-1, 0, -1], [0, 0, -1],
+
+ [1, 0, -1], [2, 0, -1], [-2, 1, -1], [-1, 1, -1], [0, 1, -1], [1, 1, -1],
+
+ [2, 1, -1], [-2, 2, -1], [-1, 2, -1], [0, 2, -1], [1, 2, -1], [2, 2, -1],
+
+ [-2, -2, 0], [-1, -2, 0], [0, -2, 0], [1, -2, 0], [2, -2, 0], [-2, -1, 0],
+
+ [-1, -1, 0], [0, -1, 0], [1, -1, 0], [2, -1, 0], [-2, 0, 0], [-1, 0, 0],
+
+ [0, 0, 0], [1, 0, 0], [2, 0, 0], [-2, 1, 0], [-1, 1, 0], [0, 1, 0],
+
+ [1, 1, 0], [2, 1, 0], [-2, 2, 0], [-1, 2, 0], [0, 2, 0], [1, 2, 0],
+
+ [2, 2, 0], [-2, -2, 1], [-1, -2, 1], [0, -2, 1], [1, -2, 1], [2, -2, 1],
+
+ [-2, -1, 1], [-1, -1, 1], [0, -1, 1], [1, -1, 1], [2, -1, 1], [-2, 0, 1],
+
+ [-1, 0, 1], [0, 0, 1], [1, 0, 1], [2, 0, 1], [-2, 1, 1], [-1, 1, 1],
+
+ [0, 1, 1], [1, 1, 1], [2, 1, 1], [-2, 2, 1], [-1, 2, 1], [0, 2, 1],
+
+ [1, 2, 1], [2, 2, 1], [-2, -2, 2], [-1, -2, 2], [0, -2, 2], [1, -2, 2],
+
+ [2, -2, 2], [-2, -1, 2], [-1, -1, 2], [0, -1, 2], [1, -1, 2], [2, -1, 2],
+
+ [-2, 0, 2], [-1, 0, 2], [0, 0, 2], [1, 0, 2], [2, 0, 2], [-2, 1, 2],
+
+ [-1, 1, 2], [0, 1, 2], [1, 1, 2], [2, 1, 2], [-2, 2, 2], [-1, 2, 2],
+
+ [0, 2, 2], [1, 2, 2], [2, 2, 2]]
+
+> posn_list_3d_size6 := map(ListTools[Reverse],
+> hypercube_points([-2,-2,-2], [+3,+3,+3]));
+posn_list_3d_size6 := [[-2, -2, -2], [-1, -2, -2], [0, -2, -2], [1, -2, -2],
+
+ [2, -2, -2], [3, -2, -2], [-2, -1, -2], [-1, -1, -2], [0, -1, -2],
+
+ [1, -1, -2], [2, -1, -2], [3, -1, -2], [-2, 0, -2], [-1, 0, -2], [0, 0, -2],
+
+ [1, 0, -2], [2, 0, -2], [3, 0, -2], [-2, 1, -2], [-1, 1, -2], [0, 1, -2],
+
+ [1, 1, -2], [2, 1, -2], [3, 1, -2], [-2, 2, -2], [-1, 2, -2], [0, 2, -2],
+
+ [1, 2, -2], [2, 2, -2], [3, 2, -2], [-2, 3, -2], [-1, 3, -2], [0, 3, -2],
+
+ [1, 3, -2], [2, 3, -2], [3, 3, -2], [-2, -2, -1], [-1, -2, -1], [0, -2, -1],
+
+ [1, -2, -1], [2, -2, -1], [3, -2, -1], [-2, -1, -1], [-1, -1, -1],
+
+ [0, -1, -1], [1, -1, -1], [2, -1, -1], [3, -1, -1], [-2, 0, -1],
+
+ [-1, 0, -1], [0, 0, -1], [1, 0, -1], [2, 0, -1], [3, 0, -1], [-2, 1, -1],
+
+ [-1, 1, -1], [0, 1, -1], [1, 1, -1], [2, 1, -1], [3, 1, -1], [-2, 2, -1],
+
+ [-1, 2, -1], [0, 2, -1], [1, 2, -1], [2, 2, -1], [3, 2, -1], [-2, 3, -1],
+
+ [-1, 3, -1], [0, 3, -1], [1, 3, -1], [2, 3, -1], [3, 3, -1], [-2, -2, 0],
+
+ [-1, -2, 0], [0, -2, 0], [1, -2, 0], [2, -2, 0], [3, -2, 0], [-2, -1, 0],
+
+ [-1, -1, 0], [0, -1, 0], [1, -1, 0], [2, -1, 0], [3, -1, 0], [-2, 0, 0],
+
+ [-1, 0, 0], [0, 0, 0], [1, 0, 0], [2, 0, 0], [3, 0, 0], [-2, 1, 0],
+
+ [-1, 1, 0], [0, 1, 0], [1, 1, 0], [2, 1, 0], [3, 1, 0], [-2, 2, 0],
+
+ [-1, 2, 0], [0, 2, 0], [1, 2, 0], [2, 2, 0], [3, 2, 0], [-2, 3, 0],
+
+ [-1, 3, 0], [0, 3, 0], [1, 3, 0], [2, 3, 0], [3, 3, 0], [-2, -2, 1],
+
+ [-1, -2, 1], [0, -2, 1], [1, -2, 1], [2, -2, 1], [3, -2, 1], [-2, -1, 1],
+
+ [-1, -1, 1], [0, -1, 1], [1, -1, 1], [2, -1, 1], [3, -1, 1], [-2, 0, 1],
+
+ [-1, 0, 1], [0, 0, 1], [1, 0, 1], [2, 0, 1], [3, 0, 1], [-2, 1, 1],
+
+ [-1, 1, 1], [0, 1, 1], [1, 1, 1], [2, 1, 1], [3, 1, 1], [-2, 2, 1],
+
+ [-1, 2, 1], [0, 2, 1], [1, 2, 1], [2, 2, 1], [3, 2, 1], [-2, 3, 1],
+
+ [-1, 3, 1], [0, 3, 1], [1, 3, 1], [2, 3, 1], [3, 3, 1], [-2, -2, 2],
+
+ [-1, -2, 2], [0, -2, 2], [1, -2, 2], [2, -2, 2], [3, -2, 2], [-2, -1, 2],
+
+ [-1, -1, 2], [0, -1, 2], [1, -1, 2], [2, -1, 2], [3, -1, 2], [-2, 0, 2],
+
+ [-1, 0, 2], [0, 0, 2], [1, 0, 2], [2, 0, 2], [3, 0, 2], [-2, 1, 2],
+
+ [-1, 1, 2], [0, 1, 2], [1, 1, 2], [2, 1, 2], [3, 1, 2], [-2, 2, 2],
+
+ [-1, 2, 2], [0, 2, 2], [1, 2, 2], [2, 2, 2], [3, 2, 2], [-2, 3, 2],
+
+ [-1, 3, 2], [0, 3, 2], [1, 3, 2], [2, 3, 2], [3, 3, 2], [-2, -2, 3],
+
+ [-1, -2, 3], [0, -2, 3], [1, -2, 3], [2, -2, 3], [3, -2, 3], [-2, -1, 3],
+
+ [-1, -1, 3], [0, -1, 3], [1, -1, 3], [2, -1, 3], [3, -1, 3], [-2, 0, 3],
+
+ [-1, 0, 3], [0, 0, 3], [1, 0, 3], [2, 0, 3], [3, 0, 3], [-2, 1, 3],
+
+ [-1, 1, 3], [0, 1, 3], [1, 1, 3], [2, 1, 3], [3, 1, 3], [-2, 2, 3],
+
+ [-1, 2, 3], [0, 2, 3], [1, 2, 3], [2, 2, 3], [3, 2, 3], [-2, 3, 3],
+
+ [-1, 3, 3], [0, 3, 3], [1, 3, 3], [2, 3, 3], [3, 3, 3]]
+
+# Maple code to define Lagrange interpolating functions/coords/coeffs
+# $Header: /cactusdevcvs/CactusBase/LocalInterp/src/GeneralizedPolynomial-Uniform/Lagrange/fns.maple,v 1.3 2002/09/02 10:22:49 jthorn Exp $
+>
+################################################################################
+>
+#
+# 1-D interpolating functions
+#
+>
+> fn_1d_order1 :=
+> proc(x)
+> + c0 + c1*x
+> end proc;
+ fn_1d_order1 := proc(x) c0 + c1*x end proc
+
+>
+> fn_1d_order2 :=
+> proc(x)
+> + c0 + c1*x + c2*x^2
+> end proc;
+ fn_1d_order2 := proc(x) c0 + c1*x + c2*x^2 end proc
+
+>
+> fn_1d_order3 :=
+> proc(x)
+> + c0 + c1*x + c2*x^2 + c3*x^3
+> end proc;
+ fn_1d_order3 := proc(x) c0 + c1*x + c2*x^2 + c3*x^3 end proc
+
+>
+> fn_1d_order4 :=
+> proc(x)
+> + c0 + c1*x + c2*x^2 + c3*x^3 + c4*x^4
+> end;
+ fn_1d_order4 := proc(x) c0 + c1*x + c2*x^2 + c3*x^3 + c4*x^4 end proc
+
+>
+> fn_1d_order5 :=
+> proc(x)
+> + c0 + c1*x + c2*x^2 + c3*x^3 + c4*x^4 + c5*x^5
+> end;
+ fn_1d_order5 := proc(x) c0 + c1*x + c2*x^2 + c3*x^3 + c4*x^4 + c5*x^5 end proc
+
+>
+> fn_1d_order6 :=
+> proc(x)
+> + c0 + c1*x + c2*x^2 + c3*x^3 + c4*x^4 + c5*x^5 + c6*x^6
+> end;
+fn_1d_order6 :=
+
+ proc(x) c0 + c1*x + c2*x^2 + c3*x^3 + c4*x^4 + c5*x^5 + c6*x^6 end proc
+
+>
+########################################
+>
+# coordinates for 1-D interpolating functions
+> coords_list_1d := [x];
+ coords_list_1d := [x]
+
+>
+########################################
+>
+#
+# coefficients in 1-D interpolating functions
+#
+>
+> coeffs_list_1d_order1 := [c0, c1];
+ coeffs_list_1d_order1 := [c0, c1]
+
+> coeffs_list_1d_order2 := [c0, c1, c2];
+ coeffs_list_1d_order2 := [c0, c1, c2]
+
+> coeffs_list_1d_order3 := [c0, c1, c2, c3];
+ coeffs_list_1d_order3 := [c0, c1, c2, c3]
+
+> coeffs_list_1d_order4 := [c0, c1, c2, c3, c4];
+ coeffs_list_1d_order4 := [c0, c1, c2, c3, c4]
+
+> coeffs_list_1d_order5 := [c0, c1, c2, c3, c4, c5];
+ coeffs_list_1d_order5 := [c0, c1, c2, c3, c4, c5]
+
+> coeffs_list_1d_order6 := [c0, c1, c2, c3, c4, c5, c6];
+ coeffs_list_1d_order6 := [c0, c1, c2, c3, c4, c5, c6]
+
+>
+################################################################################
+>
+#
+# 2-D interpolating functions (tensor-product)
+#
+>
+> fn_2d_order1 :=
+> proc(x,y)
+> + c01*y + c11*x*y
+> + c00 + c10*x
+> end proc;
+ fn_2d_order1 := proc(x, y) c01*y + c11*x*y + c00 + c10*x end proc
+
+>
+> fn_2d_order2 :=
+> proc(x,y)
+> + c02*y^2 + c12*x*y^2 + c22*x^2*y^2
+> + c01*y + c11*x*y + c21*x^2*y
+> + c00 + c10*x + c20*x^2
+> end proc;
+fn_2d_order2 := proc(x, y)
+ c02*y^2 + c12*x*y^2 + c22*x^2*y^2 + c01*y + c11*x*y + c21*x^2*y + c00
+ + c10*x + c20*x^2
+end proc
+
+>
+> fn_2d_order3 :=
+> proc(x,y)
+> + c03*y^3 + c13*x*y^3 + c23*x^2*y^3 + c33*x^3*y^3
+> + c02*y^2 + c12*x*y^2 + c22*x^2*y^2 + c32*x^3*y^2
+> + c01*y + c11*x*y + c21*x^2*y + c31*x^3*y
+> + c00 + c10*x + c20*x^2 + c30*x^3
+> end proc;
+fn_2d_order3 := proc(x, y)
+ c03*y^3 + c13*x*y^3 + c23*x^2*y^3 + c33*x^3*y^3 + c02*y^2 + c12*x*y^2
+ + c22*x^2*y^2 + c32*x^3*y^2 + c01*y + c11*x*y + c21*x^2*y + c31*x^3*y
+ + c00 + c10*x + c20*x^2 + c30*x^3
+end proc
+
+>
+> fn_2d_order4 :=
+> proc(x,y)
+> + c04*y^4 + c14*x*y^4 + c24*x^2*y^4 + c34*x^3*y^4 + c44*x^4*y^4
+> + c03*y^3 + c13*x*y^3 + c23*x^2*y^3 + c33*x^3*y^3 + c43*x^4*y^3
+> + c02*y^2 + c12*x*y^2 + c22*x^2*y^2 + c32*x^3*y^2 + c42*x^4*y^2
+> + c01*y + c11*x*y + c21*x^2*y + c31*x^3*y + c41*x^4*y
+> + c00 + c10*x + c20*x^2 + c30*x^3 + c40*x^4
+> end;
+fn_2d_order4 := proc(x, y)
+ c34*x^3*y^4 + c01*y + c10*x + c02*y^2 + c20*x^2 + c03*y^3 + c30*x^3
+ + c04*y^4 + c40*x^4 + c11*x*y + c12*x*y^2 + c22*x^2*y^2 + c21*x^2*y
+ + c13*x*y^3 + c23*x^2*y^3 + c33*x^3*y^3 + c32*x^3*y^2 + c31*x^3*y
+ + c14*x*y^4 + c24*x^2*y^4 + c44*x^4*y^4 + c00 + c43*x^4*y^3
+ + c42*x^4*y^2 + c41*x^4*y
+end proc
+
+>
+########################################
+>
+# coordinates for 2-D interpolating functions
+> coords_list_2d := [x,y];
+ coords_list_2d := [x, y]
+
+>
+########################################
+>
+#
+# coefficients in 2-D interpolating functions (tensor-product)
+#
+>
+> coeffs_list_2d_order1 := [
+> c01, c11,
+> c00, c10
+> ];
+ coeffs_list_2d_order1 := [c01, c11, c00, c10]
+
+> coeffs_list_2d_order2 := [
+> c02, c12, c22,
+> c01, c11, c21,
+> c00, c10, c20
+> ];
+ coeffs_list_2d_order2 := [c02, c12, c22, c01, c11, c21, c00, c10, c20]
+
+> coeffs_list_2d_order3 := [
+> c03, c13, c23, c33,
+> c02, c12, c22, c23,
+> c01, c11, c21, c13,
+> c00, c10, c20, c30
+> ];
+coeffs_list_2d_order3 := [c03, c13, c23, c33, c02, c12, c22, c23, c01, c11, c21,
+
+ c13, c00, c10, c20, c30]
+
+> coeffs_list_2d_order4 := [
+> c04, c14, c24, c34, c44,
+> c03, c13, c23, c33, c43,
+> c02, c12, c22, c32, c42,
+> c01, c11, c21, c31, c41,
+> c00, c10, c20, c30, c40
+> ];
+coeffs_list_2d_order4 := [c04, c14, c24, c34, c44, c03, c13, c23, c33, c43, c02,
+
+ c12, c22, c32, c42, c01, c11, c21, c31, c41, c00, c10, c20, c30, c40]
+
+>
+################################################################################
+>
+#
+# 3-D interpolating functions (tensor-product)
+#
+>
+> fn_3d_order1 :=
+> proc(x,y,z)
+# z^1 -------------------
+> + c011 *y*z + c111*x*y*z
+> + c001 *z + c101*x *z
+# z^0 -------------------
+> + c010 *y + c110*x*y
+> + c000 + c100*x
+> end proc;
+fn_3d_order1 := proc(x, y, z)
+ c011*y*z + c111*x*y*z + c001*z + c101*x*z + c010*y + c110*x*y + c000
+ + c100*x
+end proc
+
+>
+> fn_3d_order2 :=
+> proc(x,y,z)
+# z^2 --------------------------------------------------
+> + c022 *y^2*z^2 + c122*x *y^2*z^2 + c222*x^2*y^2*z^2
+> + c012 *y *z^2 + c112*x *y *z^2 + c212*x^2*y *z^2
+> + c002 *z^2 + c102*x *z^2 + c202*x^2 *z^2
+# z --------------------------------------------------
+> + c021 *y^2*z + c121*x *y^2*z + c221*x^2*y^2*z
+> + c011 *y *z + c111*x *y *z + c211*x^2*y *z
+> + c001 *z + c101*x *z + c201*x^2 *z
+# z^0 ------------------------------------------------
+> + c020 *y^2 + c120*x *y^2 + c220*x^2*y^2
+> + c010 *y + c110*x *y + c210*x^2*y
+> + c000 + c100*x + c200*x^2
+> end proc;
+fn_3d_order2 := proc(x, y, z)
+ c111*x*y*z + c122*x*y^2*z^2 + c222*x^2*y^2*z^2 + c112*x*y*z^2
+ + c212*x^2*y*z^2 + c121*x*y^2*z + c221*x^2*y^2*z + c211*x^2*y*z
+ + c011*y*z + c101*x*z + c110*x*y + c022*y^2*z^2 + c012*y*z^2
+ + c102*x*z^2 + c202*x^2*z^2 + c021*y^2*z + c201*x^2*z + c120*x*y^2
+ + c220*x^2*y^2 + c210*x^2*y + c001*z + c010*y + c000 + c100*x
+ + c002*z^2 + c020*y^2 + c200*x^2
+end proc
+
+>
+> fn_3d_order3 :=
+> proc(x,y,z)
+# z^3 ---------------------------------------------------------------------
+> + c033 *y^3*z^3 + c133*x *y^3*z^3 + c233*x^2*y^3*z^3 + c333*x^3*y^3*z^3
+> + c023 *y^2*z^3 + c123*x *y^2*z^3 + c223*x^2*y^2*z^3 + c323*x^3*y^2*z^3
+> + c013 *y *z^3 + c113*x *y *z^3 + c213*x^2*y *z^3 + c313*x^3*y *z^3
+> + c003 *z^3 + c103*x *z^3 + c203*x^2 *z^3 + c303*x^3 *z^3
+# z^2 ---------------------------------------------------------------------
+> + c032 *y^3*z^2 + c132*x *y^3*z^2 + c232*x^2*y^3*z^2 + c332*x^3*y^3*z^2
+> + c022 *y^2*z^2 + c122*x *y^2*z^2 + c222*x^2*y^2*z^2 + c322*x^3*y^2*z^2
+> + c012 *y *z^2 + c112*x *y *z^2 + c212*x^2*y *z^2 + c312*x^3*y *z^2
+> + c002 *z^2 + c102*x *z^2 + c202*x^2 *z^2 + c302*x^3 *z^2
+# z ---------------------------------------------------------------------
+> + c031 *y^3*z + c131*x *y^3*z + c231*x^2*y^3*z + c331*x^3*y^3*z
+> + c021 *y^2*z + c121*x *y^2*z + c221*x^2*y^2*z + c321*x^3*y^2*z
+> + c011 *y *z + c111*x *y *z + c211*x^2*y *z + c311*x^3*y *z
+> + c001 *z + c101*x *z + c201*x^2 *z + c301*x^3 *z
+# z^0 ---------------------------------------------------------------------
+> + c030 *y^3 + c130*x *y^3 + c230*x^2*y^3 + c330*x^3*y^3
+> + c020 *y^2 + c120*x *y^2 + c220*x^2*y^2 + c320*x^3*y^2
+> + c010 *y + c110*x *y + c210*x^2*y + c310*x^3*y
+> + c000 + c100*x + c200*x^2 + c300*x^3
+> end proc;
+fn_3d_order3 := proc(x, y, z)
+ c330*x^3*y^3 + c031*y^3*z + c103*x*z^3 + c111*x*y*z + c122*x*y^2*z^2
+ + c222*x^2*y^2*z^2 + c112*x*y*z^2 + c212*x^2*y*z^2 + c121*x*y^2*z
+ + c221*x^2*y^2*z + c211*x^2*y*z + c133*x*y^3*z^3 + c233*x^2*y^3*z^3
+ + c333*x^3*y^3*z^3 + c123*x*y^2*z^3 + c223*x^2*y^2*z^3
+ + c323*x^3*y^2*z^3 + c113*x*y*z^3 + c213*x^2*y*z^3 + c313*x^3*y*z^3
+ + c132*x*y^3*z^2 + c232*x^2*y^3*z^2 + c332*x^3*y^3*z^2
+ + c322*x^3*y^2*z^2 + c312*x^3*y*z^2 + c131*x*y^3*z + c231*x^2*y^3*z
+ + c331*x^3*y^3*z + c321*x^3*y^2*z + c311*x^3*y*z + c011*y*z + c101*x*z
+ + c110*x*y + c022*y^2*z^2 + c012*y*z^2 + c102*x*z^2 + c202*x^2*z^2
+ + c021*y^2*z + c201*x^2*z + c120*x*y^2 + c220*x^2*y^2 + c210*x^2*y
+ + c033*y^3*z^3 + c023*y^2*z^3 + c013*y*z^3 + c203*x^2*z^3
+ + c303*x^3*z^3 + c032*y^3*z^2 + c302*x^3*z^2 + c301*x^3*z + c130*x*y^3
+ + c230*x^2*y^3 + c320*x^3*y^2 + c310*x^3*y + c001*z + c010*y + c000
+ + c100*x + c002*z^2 + c020*y^2 + c200*x^2 + c003*z^3 + c030*y^3
+ + c300*x^3
+end proc
+
+>
+> fn_3d_order4 :=
+> proc(x,y,z)
+# z^4 ----------------------------------------------------------------------------------------
+> + c044 *y^4*z^4 + c144*x *y^4*z^4 + c244*x^2*y^4*z^4 + c344*x^3*y^4*z^4 + c444*x^4*y^4*z^4
+> + c034 *y^3*z^4 + c134*x *y^3*z^4 + c234*x^2*y^3*z^4 + c334*x^3*y^3*z^4 + c434*x^4*y^3*z^4
+> + c024 *y^2*z^4 + c124*x *y^2*z^4 + c224*x^2*y^2*z^4 + c324*x^3*y^2*z^4 + c424*x^4*y^2*z^4
+> + c014 *y *z^4 + c114*x *y *z^4 + c214*x^2*y *z^4 + c314*x^3*y *z^4 + c414*x^4*y *z^4
+> + c004 *z^4 + c104*x *z^4 + c204*x^2 *z^4 + c304*x^3 *z^4 + c404*x^4 *z^4
+# z^3 ----------------------------------------------------------------------------------------
+> + c043 *y^4*z^3 + c143*x *y^4*z^3 + c243*x^2*y^4*z^3 + c343*x^3*y^4*z^3 + c443*x^4*y^4*z^3
+> + c033 *y^3*z^3 + c133*x *y^3*z^3 + c233*x^2*y^3*z^3 + c333*x^3*y^3*z^3 + c433*x^4*y^3*z^3
+> + c023 *y^2*z^3 + c123*x *y^2*z^3 + c223*x^2*y^2*z^3 + c323*x^3*y^2*z^3 + c423*x^4*y^2*z^3
+> + c013 *y *z^3 + c113*x *y *z^3 + c213*x^2*y *z^3 + c313*x^3*y *z^3 + c413*x^4*y *z^3
+> + c003 *z^3 + c103*x *z^3 + c203*x^2 *z^3 + c303*x^3 *z^3 + c403*x^4 *z^3
+# z^2 ----------------------------------------------------------------------------------------
+> + c042 *y^4*z^2 + c142*x *y^4*z^2 + c242*x^2*y^4*z^2 + c342*x^3*y^4*z^2 + c442*x^4*y^4*z^2
+> + c032 *y^3*z^2 + c132*x *y^3*z^2 + c232*x^2*y^3*z^2 + c332*x^3*y^3*z^2 + c432*x^4*y^3*z^2
+> + c022 *y^2*z^2 + c122*x *y^2*z^2 + c222*x^2*y^2*z^2 + c322*x^3*y^2*z^2 + c422*x^4*y^2*z^2
+> + c012 *y *z^2 + c112*x *y *z^2 + c212*x^2*y *z^2 + c312*x^3*y *z^2 + c412*x^4*y *z^2
+> + c002 *z^2 + c102*x *z^2 + c202*x^2 *z^2 + c302*x^3 *z^2 + c402*x^4 *z^2
+# z ----------------------------------------------------------------------------------------
+> + c041 *y^4*z + c141*x *y^4*z + c241*x^2*y^4*z + c341*x^3*y^4*z + c441*x^4*y^4*z
+> + c031 *y^3*z + c131*x *y^3*z + c231*x^2*y^3*z + c331*x^3*y^3*z + c431*x^4*y^3*z
+> + c021 *y^2*z + c121*x *y^2*z + c221*x^2*y^2*z + c321*x^3*y^2*z + c421*x^4*y^2*z
+> + c011 *y *z + c111*x *y *z + c211*x^2*y *z + c311*x^3*y *z + c411*x^4*y *z
+> + c001 *z + c101*x *z + c201*x^2 *z + c301*x^3 *z + c401*x^4 *z
+# z^0 ----------------------------------------------------------------------------------------
+> + c040 *y^4 + c140*x *y^4 + c240*x^2*y^4 + c340*x^3*y^4 + c440*x^4*y^4
+> + c030 *y^3 + c130*x *y^3 + c230*x^2*y^3 + c330*x^3*y^3 + c430*x^4*y^3
+> + c020 *y^2 + c120*x *y^2 + c220*x^2*y^2 + c320*x^3*y^2 + c420*x^4*y^2
+> + c010 *y + c110*x *y + c210*x^2*y + c310*x^3*y + c410*x^4*y
+> + c000 + c100*x + c200*x^2 + c300*x^3 + c400*x^4
+> end;
+fn_3d_order4 := proc(x, y, z)
+ c104*x*z^4 + c330*x^3*y^3 + c042*y^4*z^2 + c031*y^3*z + c103*x*z^3
+ + c304*x^3*z^4 + c024*y^2*z^4 + c111*x*y*z + c122*x*y^2*z^2
+ + c222*x^2*y^2*z^2 + c112*x*y*z^2 + c212*x^2*y*z^2 + c121*x*y^2*z
+ + c221*x^2*y^2*z + c211*x^2*y*z + c133*x*y^3*z^3 + c233*x^2*y^3*z^3
+ + c333*x^3*y^3*z^3 + c123*x*y^2*z^3 + c223*x^2*y^2*z^3
+ + c323*x^3*y^2*z^3 + c113*x*y*z^3 + c213*x^2*y*z^3 + c313*x^3*y*z^3
+ + c132*x*y^3*z^2 + c232*x^2*y^3*z^2 + c332*x^3*y^3*z^2
+ + c322*x^3*y^2*z^2 + c312*x^3*y*z^2 + c131*x*y^3*z + c231*x^2*y^3*z
+ + c331*x^3*y^3*z + c321*x^3*y^2*z + c311*x^3*y*z + c144*x*y^4*z^4
+ + c244*x^2*y^4*z^4 + c344*x^3*y^4*z^4 + c444*x^4*y^4*z^4
+ + c134*x*y^3*z^4 + c234*x^2*y^3*z^4 + c334*x^3*y^3*z^4
+ + c434*x^4*y^3*z^4 + c124*x*y^2*z^4 + c224*x^2*y^2*z^4
+ + c324*x^3*y^2*z^4 + c424*x^4*y^2*z^4 + c114*x*y*z^4 + c214*x^2*y*z^4
+ + c314*x^3*y*z^4 + c414*x^4*y*z^4 + c143*x*y^4*z^3 + c243*x^2*y^4*z^3
+ + c343*x^3*y^4*z^3 + c443*x^4*y^4*z^3 + c433*x^4*y^3*z^3
+ + c423*x^4*y^2*z^3 + c413*x^4*y*z^3 + c142*x*y^4*z^2
+ + c242*x^2*y^4*z^2 + c011*y*z + c101*x*z + c110*x*y + c022*y^2*z^2
+ + c012*y*z^2 + c102*x*z^2 + c202*x^2*z^2 + c021*y^2*z + c201*x^2*z
+ + c120*x*y^2 + c220*x^2*y^2 + c210*x^2*y + c033*y^3*z^3 + c023*y^2*z^3
+ + c013*y*z^3 + c203*x^2*z^3 + c303*x^3*z^3 + c032*y^3*z^2
+ + c302*x^3*z^2 + c301*x^3*z + c130*x*y^3 + c230*x^2*y^3 + c320*x^3*y^2
+ + c310*x^3*y + c001*z + c010*y + c000 + c100*x + c002*z^2 + c020*y^2
+ + c200*x^2 + c003*z^3 + c030*y^3 + c300*x^3 + c004*z^4 + c044*y^4*z^4
+ + c034*y^3*z^4 + c014*y*z^4 + c204*x^2*z^4 + c404*x^4*z^4
+ + c043*y^4*z^3 + c403*x^4*z^3 + c402*x^4*z^2 + c041*y^4*z + c401*x^4*z
+ + c140*x*y^4 + c240*x^2*y^4 + c340*x^3*y^4 + c440*x^4*y^4
+ + c430*x^4*y^3 + c420*x^4*y^2 + c410*x^4*y + c342*x^3*y^4*z^2
+ + c442*x^4*y^4*z^2 + c432*x^4*y^3*z^2 + c422*x^4*y^2*z^2
+ + c412*x^4*y*z^2 + c141*x*y^4*z + c241*x^2*y^4*z + c341*x^3*y^4*z
+ + c441*x^4*y^4*z + c431*x^4*y^3*z + c421*x^4*y^2*z + c411*x^4*y*z
+ + c040*y^4 + c400*x^4
+end proc
+
+>
+########################################
+>
+# coordinates for 3-D interpolating functions
+> coords_list_3d := [x,y,z];
+ coords_list_3d := [x, y, z]
+
+>
+########################################
+>
+#
+# coefficients in 3-D interpolating functions
+#
+>
+> coeffs_list_3d_order1 := [
+> # z^1 -----
+> c011, c111,
+> c001, c101,
+> # z^0 -----
+> c010, c110,
+> c000, c100
+> ];
+ coeffs_list_3d_order1 := [c011, c111, c001, c101, c010, c110, c000, c100]
+
+> coeffs_list_3d_order2 := [
+> # z^2 -----------
+> c022, c122, c222,
+> c012, c112, c212,
+> c002, c102, c202,
+> # z^1 -----------
+> c021, c121, c221,
+> c011, c111, c211,
+> c001, c101, c201,
+> # z^0 -----------
+> c020, c120, c220,
+> c010, c110, c210,
+> c000, c100, c200
+> ];
+coeffs_list_3d_order2 := [c022, c122, c222, c012, c112, c212, c002, c102, c202,
+
+ c021, c121, c221, c011, c111, c211, c001, c101, c201, c020, c120, c220,
+
+ c010, c110, c210, c000, c100, c200]
+
+> coeffs_list_3d_order3 := [
+> # z^3 -----------------
+> c033, c133, c233, c333,
+> c023, c123, c223, c323,
+> c013, c113, c213, c313,
+> c003, c103, c203, c303,
+> # z^2 -----------------
+> c032, c132, c232, c332,
+> c022, c122, c222, c322,
+> c012, c112, c212, c312,
+> c002, c102, c202, c302,
+> # z^1 -----------------
+> c031, c131, c231, c331,
+> c021, c121, c221, c321,
+> c011, c111, c211, c311,
+> c001, c101, c201, c301,
+> # z^0 -----------------
+> c030, c130, c230, c330,
+> c020, c120, c220, c320,
+> c010, c110, c210, c310,
+> c000, c100, c200, c300
+> ];
+coeffs_list_3d_order3 := [c033, c133, c233, c333, c023, c123, c223, c323, c013,
+
+ c113, c213, c313, c003, c103, c203, c303, c032, c132, c232, c332, c022,
+
+ c122, c222, c322, c012, c112, c212, c312, c002, c102, c202, c302, c031,
+
+ c131, c231, c331, c021, c121, c221, c321, c011, c111, c211, c311, c001,
+
+ c101, c201, c301, c030, c130, c230, c330, c020, c120, c220, c320, c010,
+
+ c110, c210, c310, c000, c100, c200, c300]
+
+> coeffs_list_3d_order4 := [
+> # z^4 -----------------------
+> c044, c144, c244, c344, c444,
+> c034, c134, c234, c334, c434,
+> c024, c124, c224, c324, c424,
+> c014, c114, c214, c314, c414,
+> c004, c104, c204, c304, c404,
+> # z^3 -----------------------
+> c043, c143, c243, c343, c443,
+> c033, c133, c233, c333, c433,
+> c023, c123, c223, c323, c423,
+> c013, c113, c213, c313, c413,
+> c003, c103, c203, c303, c403,
+> # z^2 -----------------------
+> c042, c142, c242, c342, c442,
+> c032, c132, c232, c332, c432,
+> c022, c122, c222, c322, c422,
+> c012, c112, c212, c312, c412,
+> c002, c102, c202, c302, c402,
+> # z^1 -----------------------
+> c041, c141, c241, c341, c441,
+> c031, c131, c231, c331, c431,
+> c021, c121, c221, c321, c421,
+> c011, c111, c211, c311, c411,
+> c001, c101, c201, c301, c401,
+> # z^0 -----------------------
+> c040, c140, c240, c340, c440,
+> c030, c130, c230, c330, c430,
+> c020, c120, c220, c320, c420,
+> c010, c110, c210, c310, c410,
+> c000, c100, c200, c300, c400
+> ];
+coeffs_list_3d_order4 := [c044, c144, c244, c344, c444, c034, c134, c234, c334,
+
+ c434, c024, c124, c224, c324, c424, c014, c114, c214, c314, c414, c004,
+
+ c104, c204, c304, c404, c043, c143, c243, c343, c443, c033, c133, c233,
+
+ c333, c433, c023, c123, c223, c323, c423, c013, c113, c213, c313, c413,
+
+ c003, c103, c203, c303, c403, c042, c142, c242, c342, c442, c032, c132,
+
+ c232, c332, c432, c022, c122, c222, c322, c422, c012, c112, c212, c312,
+
+ c412, c002, c102, c202, c302, c402, c041, c141, c241, c341, c441, c031,
+
+ c131, c231, c331, c431, c021, c121, c221, c321, c421, c011, c111, c211,
+
+ c311, c411, c001, c101, c201, c301, c401, c040, c140, c240, c340, c440,
+
+ c030, c130, c230, c330, c430, c020, c120, c220, c320, c420, c010, c110,
+
+ c210, c310, c410, c000, c100, c200, c300, c400]
+
+>
+################################################################################
+# 2d.maple -- compute Lagrange interpolation coefficients in 2-D
+# $Header: /cactusdevcvs/CactusBase/LocalInterp/src/GeneralizedPolynomial-Uniform/Lagrange/2d.maple,v 1.3 2002/09/02 10:22:36 jthorn Exp $
+>
+################################################################################
+>
+#
+# 2d, cube, order=1, smoothing=0 (size=2)
+#
+>
+# interpolating polynomial
+> interp_2d_cube_order1_smooth0
+> := Lagrange_polynomial_interpolant(fn_2d_order1, coeffs_list_2d_order1,
+> coords_list_2d, posn_list_2d_size2);
+interp_2d_cube_order1_smooth0 := (-DATA(0, 0) + DATA(0, 1)) y
+
+ + (-DATA(1, 0) + DATA(0, 0) + DATA(1, 1) - DATA(0, 1)) x y + DATA(0, 0)
+
+ + (DATA(1, 0) - DATA(0, 0)) x
+
+>
+# I
+> coeffs_as_lc_of_data(%, posn_list_2d_size2);
+[COEFF(0, 0) = x y + 1 - y - x, COEFF(1, 0) = x - x y, COEFF(0, 1) = y - x y,
+
+ COEFF(1, 1) = x y]
+
+> print_coeffs__lc_of_data(%, "coeffs_I->coeff_", "fp",
+> "2d.coeffs/2d.cube.order1.smooth0/coeffs-I.compute.c");
+bytes used=1009312, alloc=917336, time=0.09
+>
+# d/dx
+> simplify( diff(interp_2d_cube_order1_smooth0,x) );
+-y DATA(1, 0) + y DATA(0, 0) + y DATA(1, 1) - y DATA(0, 1) + DATA(1, 0)
+
+ - DATA(0, 0)
+
+> coeffs_as_lc_of_data(%, posn_list_2d_size2);
+ [COEFF(0, 0) = y - 1, COEFF(1, 0) = -y + 1, COEFF(0, 1) = -y, COEFF(1, 1) = y]
+
+> print_coeffs__lc_of_data(%, "coeffs_dx->coeff_", "fp",
+> "2d.coeffs/2d.cube.order1.smooth0/coeffs-dx.compute.c");
+>
+# d/dy
+> simplify( diff(interp_2d_cube_order1_smooth0,y) );
+-DATA(0, 0) + DATA(0, 1) - x DATA(1, 0) + x DATA(0, 0) + x DATA(1, 1)
+
+ - x DATA(0, 1)
+
+> coeffs_as_lc_of_data(%, posn_list_2d_size2);
+ [COEFF(0, 0) = x - 1, COEFF(1, 0) = -x, COEFF(0, 1) = 1 - x, COEFF(1, 1) = x]
+
+> print_coeffs__lc_of_data(%, "coeffs_dy->coeff_", "fp",
+> "2d.coeffs/2d.cube.order1.smooth0/coeffs-dy.compute.c");
+>
+################################################################################
+>
+#
+# 2d, cube, order=2, smoothing=0 (size=3)
+#
+>
+# interpolating polynomial
+> interp_2d_cube_order2_smooth0
+> := Lagrange_polynomial_interpolant(fn_2d_order2, coeffs_list_2d_order2,
+> coords_list_2d, posn_list_2d_size3);
+bytes used=2009852, alloc=1376004, time=0.15
+interp_2d_cube_order2_smooth0 :=
+
+ 2
+ (-DATA(0, 0) + 1/2 DATA(0, -1) + 1/2 DATA(0, 1)) y + (1/4 DATA(1, 1)
+
+ - 1/4 DATA(-1, -1) + 1/4 DATA(1, -1) - 1/4 DATA(-1, 1) + 1/2 DATA(-1, 0)
+
+ 2
+ - 1/2 DATA(1, 0)) x y + (1/4 DATA(-1, 1) - 1/2 DATA(-1, 0)
+
+ - 1/2 DATA(1, 0) + DATA(0, 0) + 1/4 DATA(-1, -1) + 1/4 DATA(1, -1)
+
+ 2 2
+ + 1/4 DATA(1, 1) - 1/2 DATA(0, -1) - 1/2 DATA(0, 1)) x y
+
+ + (- 1/2 DATA(0, -1) + 1/2 DATA(0, 1)) y +
+
+ (1/4 DATA(1, 1) + 1/4 DATA(-1, -1) - 1/4 DATA(1, -1) - 1/4 DATA(-1, 1)) x y
+
+ + (1/4 DATA(1, 1) - 1/4 DATA(-1, -1) - 1/4 DATA(1, -1) + 1/4 DATA(-1, 1)
+
+ 2
+ + 1/2 DATA(0, -1) - 1/2 DATA(0, 1)) x y + DATA(0, 0)
+
+ + (- 1/2 DATA(-1, 0) + 1/2 DATA(1, 0)) x
+
+ 2
+ + (1/2 DATA(-1, 0) + 1/2 DATA(1, 0) - DATA(0, 0)) x
+
+>
+# I
+> coeffs_as_lc_of_data(%, posn_list_2d_size3);
+ 2 2 2 2
+[COEFF(-1, -1) = - 1/4 x y - 1/4 x y + 1/4 x y + 1/4 x y ,
+
+ 2 2 2 2
+ COEFF(0, -1) = 1/2 y - 1/2 x y - 1/2 y + 1/2 x y,
+
+ 2 2 2 2
+ COEFF(1, -1) = 1/4 x y - 1/4 x y + 1/4 x y - 1/4 x y,
+
+ 2 2 2 2
+ COEFF(-1, 0) = 1/2 x y + 1/2 x - 1/2 x - 1/2 x y ,
+
+ 2 2 2 2
+ COEFF(0, 0) = -y + x y + 1 - x ,
+
+ 2 2 2 2
+ COEFF(1, 0) = 1/2 x - 1/2 x y + 1/2 x - 1/2 x y ,
+
+ 2 2 2 2
+ COEFF(-1, 1) = - 1/4 x y - 1/4 x y + 1/4 x y + 1/4 x y ,
+
+ 2 2 2 2
+ COEFF(0, 1) = 1/2 y - 1/2 x y - 1/2 x y + 1/2 y,
+
+ 2 2 2 2
+ COEFF(1, 1) = 1/4 x y + 1/4 x y + 1/4 x y + 1/4 x y ]
+
+> print_coeffs__lc_of_data(%, "coeffs_I->coeff_", "fp",
+> "2d.coeffs/2d.cube.order2.smooth0/coeffs-I.compute.c");
+bytes used=3010044, alloc=1638100, time=0.21
+bytes used=4010200, alloc=1703624, time=0.29
+>
+# d/dx
+> simplify( diff(interp_2d_cube_order2_smooth0,x) );
+bytes used=5010460, alloc=1703624, time=0.36
+ 2
+1/2 DATA(1, 0) + 1/2 x y DATA(-1, -1) + 1/2 x y DATA(1, 1)
+
+ - 1/2 x y DATA(-1, -1) - 1/2 x y DATA(1, -1) + 1/2 x y DATA(-1, 1)
+
+ 2
+ + x y DATA(0, -1) - x y DATA(0, 1) + 1/2 x y DATA(-1, 1)
+
+ 2 2 2
+ - x y DATA(-1, 0) - x y DATA(1, 0) + 2 x y DATA(0, 0)
+
+ 2 2 2
+ + 1/2 x y DATA(1, -1) + 1/2 x y DATA(1, 1) - x y DATA(0, -1)
+
+ 2 2
+ - x y DATA(0, 1) - 1/2 DATA(-1, 0) - 1/2 y DATA(1, 0)
+
+ + 1/4 y DATA(-1, -1) - 1/4 y DATA(1, -1) - 1/4 y DATA(-1, 1)
+
+ 2 2
+ + 1/4 y DATA(1, 1) + 1/4 y DATA(1, 1) - 1/4 y DATA(-1, -1)
+
+ 2 2 2
+ + 1/4 y DATA(1, -1) - 1/4 y DATA(-1, 1) + 1/2 y DATA(-1, 0)
+
+ + x DATA(-1, 0) - 2 x DATA(0, 0) + x DATA(1, 0)
+
+> coeffs_as_lc_of_data(%, posn_list_2d_size3);
+ 2 2 2
+[COEFF(-1, -1) = 1/4 y + 1/2 x y - 1/2 x y - 1/4 y , COEFF(0, -1) = x y - x y ,
+
+ 2 2
+ COEFF(1, -1) = 1/2 x y + 1/4 y - 1/2 x y - 1/4 y,
+
+ 2 2 2
+ COEFF(-1, 0) = x + 1/2 y - x y - 1/2, COEFF(0, 0) = -2 x + 2 x y ,
+
+ 2 2
+ COEFF(1, 0) = - 1/2 y + x - x y + 1/2,
+
+ 2 2
+ COEFF(-1, 1) = - 1/4 y + 1/2 x y - 1/4 y + 1/2 x y ,
+
+ 2
+ COEFF(0, 1) = -x y - x y ,
+
+ 2 2
+ COEFF(1, 1) = 1/2 x y + 1/2 x y + 1/4 y + 1/4 y]
+
+> print_coeffs__lc_of_data(%, "coeffs_dx->coeff_", "fp",
+> "2d.coeffs/2d.cube.order2.smooth0/coeffs-dx.compute.c");
+bytes used=6011072, alloc=1769148, time=0.42
+>
+# d/dy
+> simplify( diff(interp_2d_cube_order2_smooth0,y) );
+bytes used=7011376, alloc=1769148, time=0.49
+1/2 DATA(0, 1) + 1/2 x y DATA(1, 1) - 1/2 x y DATA(-1, -1)
+
+ + 1/2 x y DATA(1, -1) - 1/2 x y DATA(-1, 1) - 1/2 DATA(0, -1)
+
+ 2 2 2
+ - x y DATA(1, 0) + 1/2 x y DATA(1, 1) - x y DATA(0, 1)
+
+ 2
+ - x y DATA(0, -1) - x y DATA(1, 0) + x y DATA(-1, 0) + 1/4 x DATA(1, 1)
+
+ + 1/4 x DATA(-1, -1) - 1/4 x DATA(1, -1) - 1/4 x DATA(-1, 1)
+
+ 2 2 2
+ + 1/4 x DATA(1, 1) - 1/4 x DATA(-1, -1) - 1/4 x DATA(1, -1)
+
+ 2 2 2
+ + 1/4 x DATA(-1, 1) + 1/2 x DATA(0, -1) - 1/2 x DATA(0, 1)
+
+ 2
+ - 2 y DATA(0, 0) + y DATA(0, -1) + y DATA(0, 1) + 2 x y DATA(0, 0)
+
+ 2 2 2
+ + 1/2 x y DATA(-1, 1) + 1/2 x y DATA(1, -1) + 1/2 x y DATA(-1, -1)
+
+ 2
+ - x y DATA(-1, 0)
+
+> coeffs_as_lc_of_data(%, posn_list_2d_size3);
+ 2 2
+[COEFF(-1, -1) = - 1/2 x y + 1/2 x y - 1/4 x + 1/4 x,
+
+ 2 2
+ COEFF(0, -1) = -x y - 1/2 + 1/2 x + y,
+
+ 2 2
+ COEFF(1, -1) = 1/2 x y + 1/2 x y - 1/4 x - 1/4 x,
+
+ 2 2
+ COEFF(-1, 0) = x y - x y, COEFF(0, 0) = -2 y + 2 x y,
+
+ 2
+ COEFF(1, 0) = -x y - x y,
+
+ 2 2
+ COEFF(-1, 1) = 1/2 x y + 1/4 x - 1/2 x y - 1/4 x,
+
+ 2 2
+ COEFF(0, 1) = 1/2 - 1/2 x - x y + y,
+
+ 2 2
+ COEFF(1, 1) = 1/4 x + 1/2 x y + 1/2 x y + 1/4 x ]
+
+> print_coeffs__lc_of_data(%, "coeffs_dy->coeff_", "fp",
+> "2d.coeffs/2d.cube.order2.smooth0/coeffs-dy.compute.c");
+bytes used=8011672, alloc=1769148, time=0.57
+>
+# d^2/dx^2
+> simplify( diff(interp_2d_cube_order2_smooth0,x,x) );
+ 2 2 2 2
+1/2 y DATA(-1, 1) - y DATA(-1, 0) - y DATA(1, 0) + 2 y DATA(0, 0)
+
+ 2 2 2
+ + 1/2 y DATA(-1, -1) + 1/2 y DATA(1, -1) + 1/2 y DATA(1, 1)
+
+ 2 2
+ - y DATA(0, -1) - y DATA(0, 1) + 1/2 y DATA(1, 1) - 1/2 y DATA(-1, -1)
+
+ - 1/2 y DATA(1, -1) + 1/2 y DATA(-1, 1) + y DATA(0, -1) - y DATA(0, 1)
+
+ + DATA(-1, 0) + DATA(1, 0) - 2 DATA(0, 0)
+
+> coeffs_as_lc_of_data(%, posn_list_2d_size3);
+ 2 2
+[COEFF(-1, -1) = - 1/2 y + 1/2 y , COEFF(0, -1) = y - y ,
+
+ 2 2
+ COEFF(1, -1) = - 1/2 y + 1/2 y , COEFF(-1, 0) = -y + 1,
+
+ 2 2
+ COEFF(0, 0) = 2 y - 2, COEFF(1, 0) = -y + 1,
+
+ 2 2
+ COEFF(-1, 1) = 1/2 y + 1/2 y, COEFF(0, 1) = -y - y,
+
+ 2
+ COEFF(1, 1) = 1/2 y + 1/2 y]
+
+> print_coeffs__lc_of_data(%, "coeffs_dxx->coeff_", "fp",
+> "2d.coeffs/2d.cube.order2.smooth0/coeffs-dxx.compute.c");
+bytes used=9011872, alloc=1834672, time=0.66
+>
+# d^2/dxdy
+> simplify( diff(interp_2d_cube_order2_smooth0,x,y) );
+1/4 DATA(1, 1) - 2 x y DATA(0, -1) - 2 x y DATA(0, 1) + x y DATA(-1, 1)
+
+ - 2 x y DATA(-1, 0) - 2 x y DATA(1, 0) + 4 x y DATA(0, 0)
+
+ + x y DATA(-1, -1) + x y DATA(1, -1) + x y DATA(1, 1) + 1/2 y DATA(1, 1)
+
+ - 1/2 y DATA(-1, -1) + 1/2 y DATA(1, -1) - 1/2 y DATA(-1, 1)
+
+ + 1/4 DATA(-1, -1) - 1/4 DATA(1, -1) - 1/4 DATA(-1, 1) + x DATA(0, -1)
+
+ - x DATA(0, 1) + 1/2 x DATA(1, 1) - 1/2 x DATA(-1, -1) - 1/2 x DATA(1, -1)
+
+ + 1/2 x DATA(-1, 1) + y DATA(-1, 0) - y DATA(1, 0)
+
+> coeffs_as_lc_of_data(%, posn_list_2d_size3);
+[COEFF(-1, -1) = - 1/2 y + x y - 1/2 x + 1/4, COEFF(0, -1) = -2 x y + x,
+
+ COEFF(1, -1) = - 1/2 x - 1/4 + x y + 1/2 y, COEFF(-1, 0) = -2 x y + y,
+
+ COEFF(0, 0) = 4 x y, COEFF(1, 0) = -y - 2 x y,
+
+ COEFF(-1, 1) = x y - 1/2 y - 1/4 + 1/2 x, COEFF(0, 1) = -2 x y - x,
+
+ COEFF(1, 1) = 1/4 + x y + 1/2 x + 1/2 y]
+
+> print_coeffs__lc_of_data(%, "coeffs_dxy->coeff_", "fp",
+> "2d.coeffs/2d.cube.order2.smooth0/coeffs-dxy.compute.c");
+bytes used=10012088, alloc=1834672, time=0.74
+>
+# d^2/dy^2
+> simplify( diff(interp_2d_cube_order2_smooth0,y,y) );
+-2 DATA(0, 0) + DATA(0, -1) + DATA(0, 1) + 1/2 x DATA(1, 1)
+
+ - 1/2 x DATA(-1, -1) + 1/2 x DATA(1, -1) - 1/2 x DATA(-1, 1)
+
+ 2 2
+ + x DATA(-1, 0) - x DATA(1, 0) + 1/2 x DATA(-1, 1) - x DATA(-1, 0)
+
+ 2 2 2
+ - x DATA(1, 0) + 2 x DATA(0, 0) + 1/2 x DATA(-1, -1)
+
+ 2 2 2 2
+ + 1/2 x DATA(1, -1) + 1/2 x DATA(1, 1) - x DATA(0, -1) - x DATA(0, 1)
+
+> coeffs_as_lc_of_data(%, posn_list_2d_size3);
+ 2 2
+[COEFF(-1, -1) = 1/2 x - 1/2 x, COEFF(0, -1) = 1 - x ,
+
+ 2 2
+ COEFF(1, -1) = 1/2 x + 1/2 x , COEFF(-1, 0) = -x + x,
+
+ 2 2
+ COEFF(0, 0) = 2 x - 2, COEFF(1, 0) = -x - x ,
+
+ 2 2
+ COEFF(-1, 1) = 1/2 x - 1/2 x, COEFF(0, 1) = 1 - x ,
+
+ 2
+ COEFF(1, 1) = 1/2 x + 1/2 x ]
+
+> print_coeffs__lc_of_data(%, "coeffs_dyy->coeff_", "fp",
+> "2d.coeffs/2d.cube.order2.smooth0/coeffs-dyy.compute.c");
+bytes used=11012264, alloc=1834672, time=0.82
+>
+################################################################################
+>
+#
+# 2d, cube, order=3, smoothing=0 (size=4)
+#
+>
+# interpolating polynomial
+> interp_2d_cube_order3_smooth0
+> := Lagrange_polynomial_interpolant(fn_2d_order3, coeffs_list_2d_order3,
+> coords_list_2d, posn_list_2d_size4);
+bytes used=12012452, alloc=1834672, time=0.88
+bytes used=13012804, alloc=1900196, time=0.94
+bytes used=14014276, alloc=1900196, time=0.99
+bytes used=15014880, alloc=1965720, time=1.05
+bytes used=16015128, alloc=1965720, time=1.12
+bytes used=17015368, alloc=1965720, time=1.18
+bytes used=18015556, alloc=1965720, time=1.25
+bytes used=19016348, alloc=1965720, time=1.31
+bytes used=20016508, alloc=1965720, time=1.38
+bytes used=21016664, alloc=1965720, time=1.44
+bytes used=22016880, alloc=1965720, time=1.51
+bytes used=23019452, alloc=1965720, time=1.57
+bytes used=24021724, alloc=1965720, time=1.63
+bytes used=25022340, alloc=1965720, time=1.69
+interp_2d_cube_order3_smooth0 := (1/8 DATA(2, 1) - 1/4 DATA(2, 0)
+
+ + 1/8 DATA(2, -1) - 3/2 c32 + 1/4 DATA(0, 0) + 1/4 DATA(1, 0)
+
+ - 1/8 DATA(0, 1) - 1/8 DATA(1, 1) + 1/8 DATA(-1, -1) - 1/8 DATA(0, -1)
+
+ 2 2 /
+ - 1/8 DATA(1, -1) - 1/4 DATA(-1, 0) + 1/8 DATA(-1, 1)) x y + |
+ \
+
+ 11
+ - 1/120 DATA(2, 2) - 7/120 DATA(1, 2) + --- DATA(-1, 2) - 1/40 DATA(0, 2)
+ 120
+
+ 13
+ + 1/20 DATA(2, 1) - 1/40 DATA(2, 0) - 1/60 DATA(2, -1) - -- c31
+ 10
+
+ - 3/40 DATA(0, 0) - 7/40 DATA(1, 0) + 3/20 DATA(0, 1) + 7/20 DATA(1, 1)
+
+ 11 11
+ + -- DATA(-1, -1) - 1/20 DATA(0, -1) - 7/60 DATA(1, -1) + -- DATA(-1, 0)
+ 60 40
+
+ 11 \
+ - -- DATA(-1, 1)| x y + (- 1/24 DATA(2, 2) + 1/24 DATA(1, 2)
+ 20 /
+
+ - 1/24 DATA(-1, 2) + 1/24 DATA(0, 2) + 1/4 DATA(2, 1) - 1/8 DATA(2, 0)
+
+ - 1/12 DATA(2, -1) - 3/2 c31 + 1/8 DATA(0, 0) + 1/8 DATA(1, 0)
+
+ - 1/4 DATA(0, 1) - 1/4 DATA(1, 1) - 1/12 DATA(-1, -1) + 1/12 DATA(0, -1)
+
+ 2
+ + 1/12 DATA(1, -1) - 1/8 DATA(-1, 0) + 1/4 DATA(-1, 1)) x y
+
+ + 3/2000 DATA(2, 2) - 9/2000 DATA(1, 2) - 3/2000 DATA(-1, 2)
+
+ 87 201 111
+ + 9/2000 DATA(0, 2) + ---- DATA(2, 1) - ---- DATA(2, 0) + ---- DATA(2, -1)
+ 2000 2000 2000
+
+ 3 3 2 / 53 409
+ + c31 x y + c32 x y + |- ---- DATA(2, 2) + ---- DATA(1, 2)
+ \ 3000 3000
+
+ 197 53 31 101
+ - ---- DATA(-1, 2) - ---- DATA(0, 2) - ---- DATA(2, 1) + ---- DATA(2, 0)
+ 3000 1000 1500 3000
+
+ 13 91 101
+ + 7/1500 DATA(2, -1) + -- c32 + --- c31 + ---- DATA(0, 0)
+ 25 250 1000
+
+ 149 31 47 59
+ + ---- DATA(1, 0) - --- DATA(0, 1) - --- DATA(1, 1) + --- DATA(-1, -1)
+ 1000 500 250 750
+
+ 73 851 203
+ + 7/500 DATA(0, -1) - --- DATA(1, -1) - ---- DATA(-1, 0) + --- DATA(-1, 1)
+ 750 3000 750
+
+ \ 3 / 29 43
+ | x y + |7/600 DATA(2, 2) + --- DATA(1, 2) + --- DATA(-1, 2)
+ / \ 600 600
+
+ 79 27
+ - --- DATA(0, 2) - 3/25 DATA(2, 1) + --- DATA(2, 0) - 2/75 DATA(2, -1)
+ 600 200
+
+ 21 19 31
+ + 3/5 c32 + -- c31 - --- DATA(0, 0) - --- DATA(1, 0) + 7/50 DATA(0, 1)
+ 50 200 200
+
+ 11 17 13
+ + --- DATA(1, 1) - --- DATA(-1, -1) + --- DATA(0, -1) - 1/300 DATA(1, -1)
+ 100 300 150
+
+ 23 13 \ 2 3
+ + --- DATA(-1, 0) - --- DATA(-1, 1)| x y + (1/50 DATA(2, 2)
+ 200 100 /
+
+ - 3/50 DATA(1, 2) - 1/50 DATA(-1, 2) + 3/50 DATA(0, 2) - 1/300 DATA(2, 1)
+
+ - 1/150 DATA(2, 0) - 1/100 DATA(2, -1) - 2/5 c32 - 7/25 c31
+
+ - 1/50 DATA(0, 0) + 1/50 DATA(1, 0) - 1/100 DATA(0, 1) + 1/100 DATA(1, 1)
+
+ + 1/100 DATA(-1, -1) - 3/100 DATA(0, -1) + 3/100 DATA(1, -1)
+
+ 3 3 /
+ + 1/150 DATA(-1, 0) + 1/300 DATA(-1, 1)) x y + |1/40 DATA(2, 1)
+ \
+
+ 13
+ - 1/20 DATA(2, 0) + 1/40 DATA(2, -1) - -- c32 - 3/20 DATA(0, 0)
+ 10
+
+ 11
+ - 7/20 DATA(1, 0) + 3/40 DATA(0, 1) + 7/40 DATA(1, 1) - -- DATA(-1, -1)
+ 40
+
+ 11 11 \
+ + 3/40 DATA(0, -1) + 7/40 DATA(1, -1) + -- DATA(-1, 0) - -- DATA(-1, 1)| x
+ 20 40 /
+
+ 2 63 27 1397 603
+ y - --- c32 + --- c31 + ---- DATA(0, 0) + ---- DATA(1, 0)
+ 100 500 2000 2000
+
+ 261 261 /
+ + ---- DATA(0, 1) - ---- DATA(1, 1) + |- 1/400 DATA(2, 2)
+ 2000 2000 \
+
+ 29
+ + 3/400 DATA(1, 2) + 1/400 DATA(-1, 2) - 3/400 DATA(0, 2) - --- DATA(2, 1)
+ 400
+
+ 67 37 21 199
+ + --- DATA(2, 0) - --- DATA(2, -1) + -- c32 - 9/100 c31 - --- DATA(0, 0)
+ 400 400 20 400
+
+ 87 87 37
+ - 1/400 DATA(1, 0) - --- DATA(0, 1) + --- DATA(1, 1) + --- DATA(-1, -1)
+ 400 400 400
+
+ 111 111 133 29 \
+ - --- DATA(0, -1) + --- DATA(1, -1) + --- DATA(-1, 0) + --- DATA(-1, 1)|
+ 400 400 400 400 /
+
+ 2 /
+ x + |1/600 DATA(2, 2) - 1/200 DATA(1, 2) - 1/600 DATA(-1, 2)
+ \
+
+ 29 11 37
+ + 1/200 DATA(0, 2) + --- DATA(2, 1) + --- DATA(2, 0) + --- DATA(2, -1)
+ 600 200 600
+
+ 33 33 29
+ - 7/10 c32 + 3/50 c31 + --- DATA(0, 0) - --- DATA(1, 0) + --- DATA(0, 1)
+ 200 200 200
+
+ 29 37 37 37
+ - --- DATA(1, 1) - --- DATA(-1, -1) + --- DATA(0, -1) - --- DATA(1, -1)
+ 200 600 200 200
+
+ 11 29 \ 3 /
+ - --- DATA(-1, 0) - --- DATA(-1, 1)| x + |- 3/40 DATA(2, 1)
+ 200 600 / \
+
+ 11
+ + 3/20 DATA(2, 0) - 3/40 DATA(2, -1) + 9/10 c32 - -- DATA(0, 0)
+ 20
+
+ 11
+ - 9/20 DATA(1, 0) + -- DATA(0, 1) + 9/40 DATA(1, 1) + 3/40 DATA(-1, -1)
+ 40
+
+ 11 \
+ + -- DATA(0, -1) + 9/40 DATA(1, -1) - 3/20 DATA(-1, 0) + 3/40 DATA(-1, 1)|
+ 40 /
+
+ 2 / 21
+ y + |- 7/1000 DATA(2, 2) + ---- DATA(1, 2) + 7/1000 DATA(-1, 2)
+ \ 1000
+
+ 437 81
+ + ---- DATA(0, 2) + 9/125 DATA(2, 1) - ---- DATA(2, 0) + 2/125 DATA(2, -1)
+ 3000 1000
+
+ 63 257 243 71
+ - 9/25 c32 - --- c31 + ---- DATA(0, 0) + ---- DATA(1, 0) - --- DATA(0, 1)
+ 250 1000 1000 250
+
+ 27 89
+ - --- DATA(1, 1) - 2/125 DATA(-1, -1) - --- DATA(0, -1)
+ 125 750
+
+ 81 \ 3 /
+ - 6/125 DATA(1, -1) + ---- DATA(-1, 0) - 9/125 DATA(-1, 1)| y + |
+ 1000 / \
+
+ 13 13 13 13
+ - ---- DATA(2, 2) + ---- DATA(1, 2) + ---- DATA(-1, 2) - ---- DATA(0, 2)
+ 6000 2000 6000 2000
+
+ 377 43 481 91 39
+ - ---- DATA(2, 1) - ---- DATA(2, 0) - ---- DATA(2, -1) + --- c32 - --- c31
+ 6000 2000 6000 100 500
+
+ 129 1129 377 377
+ - ---- DATA(0, 0) + ---- DATA(1, 0) - ---- DATA(0, 1) + ---- DATA(1, 1)
+ 2000 2000 2000 2000
+
+ 481 481 481
+ + ---- DATA(-1, -1) - ---- DATA(0, -1) + ---- DATA(1, -1)
+ 6000 2000 2000
+
+ 957 377 \ /
+ - ---- DATA(-1, 0) + ---- DATA(-1, 1)| x + |1/40 DATA(2, 2)
+ 2000 6000 / \
+
+ 11
+ - 3/40 DATA(1, 2) - 1/40 DATA(-1, 2) - --- DATA(0, 2) - 3/20 DATA(2, 1)
+ 120
+
+ 11
+ + 3/40 DATA(2, 0) + 1/20 DATA(2, -1) + 9/10 c31 - -- DATA(0, 0)
+ 40
+
+ 11
+ - 9/40 DATA(1, 0) + -- DATA(0, 1) + 9/20 DATA(1, 1) - 1/20 DATA(-1, -1)
+ 20
+
+ 11 \
+ - -- DATA(0, -1) - 3/20 DATA(1, -1) - 3/40 DATA(-1, 0) + 3/20 DATA(-1, 1)|
+ 60 /
+
+ 111 333 333
+ y - ---- DATA(-1, -1) + ---- DATA(0, -1) - ---- DATA(1, -1)
+ 2000 2000 2000
+
+ 201 87
+ + ---- DATA(-1, 0) - ---- DATA(-1, 1)
+ 2000 2000
+
+>
+# I
+> coeffs_as_lc_of_data(%, posn_list_2d_size4);
+bytes used=26023908, alloc=1965720, time=1.75
+ 59 3 37 2 2 37 3 11
+[COEFF(-1, -1) = --- x y + --- x - 1/12 x y - --- x + -- x y - 1/20 y
+ 750 400 600 60
+
+ 481 3 3 3 2 2 2 11 2 111
+ + ---- x + 1/100 x y - 2/125 y + 1/8 x y + 3/40 y - -- x y - ----
+ 6000 40 2000
+
+ 17 2 3 13 2 3 2 3 333
+ - --- x y , COEFF(0, -1) = --- x y + 1/12 x y + 7/500 x y + ----
+ 300 150 2000
+
+ 2 2 2 481 111 2 11 37 3 3 3
+ + 3/40 x y - 1/8 x y - ---- x - --- x - -- y + --- x - 3/100 x y
+ 2000 400 60 200
+
+ 11 2 89 3 2 2 2 333
+ + -- y - 1/20 x y - --- y , COEFF(1, -1) = 1/12 x y - 1/8 x y - ----
+ 40 750 2000
+
+ 2 3 2 3 3 111 2 73 3
+ - 1/300 x y + 7/40 x y + 3/100 x y + --- x - 7/60 x y - --- x y
+ 400 750
+
+ 3 2 481 37 3
+ - 6/125 y - 3/20 y + 9/40 y + ---- x - --- x , COEFF(2, -1) = - 1/60 x y
+ 2000 200
+
+ 3 3 2 481 3 37 2
+ - 1/100 x y + 1/40 x y - ---- x + 1/20 y + 7/1500 x y - --- x
+ 6000 400
+
+ 2 3 2 3 2 111 37 3 2 2
+ - 1/12 x y + 2/125 y - 2/75 x y - 3/40 y + ---- + --- x + 1/8 x y ,
+ 2000 600
+
+ 201 23 2 3 133 2 11 2 2
+ COEFF(-1, 0) = ---- + --- x y + --- x + -- x y - 3/40 y - 1/4 x y
+ 2000 200 400 40
+
+ 11 3 11 2 957 2 3 3 2 851 3
+ - --- x + -- x y - ---- x - 1/8 x y + 1/150 x y - 3/20 y - ---- x y
+ 200 20 2000 3000
+
+ 81 3 19 2 3 3 3 11 2
+ + ---- y , COEFF(0, 0) = - --- x y - 1/50 x y - 3/40 x y - -- y
+ 1000 200 20
+
+ 257 3 11 129 101 3 33 3 2 199 2
+ + ---- y - -- y - ---- x + ---- x y + --- x + 1/8 x y - --- x
+ 1000 40 2000 1000 200 400
+
+ 2 2 2 1397 2 2 1129
+ + 1/4 x y - 3/20 x y + ----, COEFF(1, 0) = 1/4 x y + ---- x
+ 2000 2000
+
+ 149 3 2 3 3 2
+ - 7/40 x y + ---- x y - 1/400 x + 1/50 x y - 9/40 y - 7/20 x y
+ 1000
+
+ 2 603 243 3 33 3 2 31 2 3
+ - 9/20 y + ---- + ---- y - --- x + 1/8 x y - --- x y , COEFF(2, 0) =
+ 2000 1000 200 200
+
+ 2 2 101 3 11 3 3 3 2
+ - 1/4 x y + ---- x y + --- x - 1/150 x y - 1/8 x y + 3/40 y
+ 3000 200
+
+ 67 2 2 2 201 81 3 43
+ - 1/40 x y + --- x - 1/20 x y + 3/20 y - ---- - ---- y - ---- x
+ 400 2000 1000 2000
+
+ 27 2 3 11 2 2 2 29 3 11
+ + --- x y , COEFF(-1, 1) = - -- x y + 1/8 x y - --- x - -- x y
+ 200 40 600 20
+
+ 377 203 3 13 2 3 29 2 87 2
+ + ---- x + --- x y + 3/20 y - --- x y + --- x - ---- + 1/4 x y
+ 6000 750 100 400 2000
+
+ 3 3 3 2 261 2 3
+ + 1/300 x y - 9/125 y + 3/40 y , COEFF(0, 1) = ---- + 7/50 x y
+ 2000
+
+ 2 71 3 2 2 2 11 2 87 2
+ - 1/4 x y - --- y + 3/40 x y - 1/8 x y + 3/20 x y + -- y - --- x
+ 250 40 400
+
+ 3 3 31 3 377 11 29 3 87 2
+ - 1/100 x y - --- x y - ---- x + -- y + --- x , COEFF(1, 1) = --- x
+ 500 2000 20 200 400
+
+ 2 27 3 2 3 3 11 2 3
+ + 9/40 y + 9/20 y - --- y - 1/4 x y + 1/100 x y + --- x y
+ 125 100
+
+ 47 3 2 377 261 29 3 2 2
+ - --- x y + 7/40 x y + ---- x - ---- - --- x + 7/20 x y - 1/8 x y ,
+ 250 2000 2000 200
+
+ 87 29 2 2 31 3 2 2 3
+ COEFF(2, 1) = ---- - --- x + 1/4 x y - ---- x y - 3/40 y - 3/25 x y
+ 2000 400 1500
+
+ 377 3 29 3 2 3 3
+ - 3/20 y - ---- x + 9/125 y + --- x + 1/40 x y + 1/20 x y - 1/300 x y
+ 6000 600
+
+ 2 2 2 3 3 3
+ + 1/8 x y , COEFF(-1, 2) = 1/400 x - 1/40 y - 1/50 x y + 7/1000 y
+
+ 11 13 2 197 3 3 43 2 3
+ + --- x y + ---- x - 1/24 x y - 3/2000 - ---- x y - 1/600 x + --- x y
+ 120 6000 3000 600
+
+ 2 11 53 3 2
+ , COEFF(0, 2) = - 3/400 x - --- y - 1/40 x y - ---- x y + 1/24 x y
+ 120 1000
+
+ 13 3 3 3 437 3 79 2 3
+ - ---- x + 9/2000 + 3/50 x y + 1/200 x + ---- y - --- x y ,
+ 2000 3000 600
+
+ 2 3 3 409 3 3
+ COEFF(1, 2) = 3/400 x - 3/40 y - 3/50 x y + ---- x y - 1/200 x
+ 3000
+
+ 21 3 2 29 2 3 13
+ + ---- y + 1/24 x y + --- x y - 7/120 x y - 9/2000 + ---- x,
+ 1000 600 2000
+
+ 2 53 3 3
+ COEFF(2, 2) = - 1/400 x + 3/2000 + 1/40 y - ---- x y - 7/1000 y
+ 3000
+
+ 3 3 13 2 2 3 3
+ + 1/50 x y - ---- x - 1/24 x y + 7/600 x y - 1/120 x y + 1/600 x ]
+ 6000
+
+> print_coeffs__lc_of_data(%, "coeffs_I->coeff_", "fp",
+> "2d.coeffs/2d.cube.order3.smooth0/coeffs-I.compute.c");
+bytes used=27024116, alloc=2031244, time=1.82
+bytes used=28024396, alloc=2031244, time=1.90
+bytes used=29025884, alloc=2162292, time=1.99
+bytes used=30026144, alloc=2162292, time=2.06
+bytes used=31027088, alloc=2162292, time=2.12
+bytes used=32027348, alloc=2162292, time=2.18
+bytes used=33027500, alloc=2162292, time=2.24
+bytes used=34027920, alloc=2162292, time=2.30
+bytes used=35028400, alloc=2162292, time=2.38
+bytes used=36028584, alloc=2162292, time=2.46
+bytes used=37028772, alloc=2162292, time=2.56
+bytes used=38028952, alloc=2162292, time=2.67
+bytes used=39029156, alloc=2162292, time=2.73
+bytes used=40029332, alloc=2162292, time=2.80
+bytes used=41029504, alloc=2162292, time=2.92
+bytes used=42029680, alloc=2162292, time=2.99
+bytes used=43029840, alloc=2162292, time=3.09
+bytes used=44030180, alloc=2162292, time=3.20
+bytes used=45030460, alloc=2162292, time=3.31
+bytes used=46030800, alloc=2162292, time=3.38
+bytes used=47030988, alloc=2162292, time=3.48
+bytes used=48031208, alloc=2162292, time=3.62
+bytes used=49031368, alloc=2162292, time=3.76
+>
+# d/dx
+> simplify( diff(interp_2d_cube_order3_smooth0,x) );
+bytes used=50031616, alloc=2162292, time=3.86
+bytes used=51059256, alloc=2162292, time=3.92
+bytes used=52059500, alloc=2162292, time=3.99
+ 3 13 13 13
+6/5 x y c32 - ---- DATA(2, 2) + ---- DATA(1, 2) + ---- DATA(-1, 2)
+ 6000 2000 6000
+
+ 13 377 43 481
+ - ---- DATA(0, 2) - ---- DATA(2, 1) - ---- DATA(2, 0) - ---- DATA(2, -1)
+ 2000 6000 2000 6000
+
+ 2 2 2 91 39
+ + 3 c32 x y + 3 c31 x y + 1/20 y DATA(2, 1) + --- c32 - --- c31
+ 100 500
+
+ 129 1129 377 377
+ - ---- DATA(0, 0) + ---- DATA(1, 0) - ---- DATA(0, 1) + ---- DATA(1, 1)
+ 2000 2000 2000 2000
+
+ 2 2 3 21 2 3 13
+ - 3 x y c32 - 6/5 x y c32 - -- x y c31 - 3 x y c31 - -- y c31
+ 25 10
+
+ 13 3 91 3 13 2
+ + -- y c32 + --- y c31 - -- y c32 - 1/60 y DATA(2, -1)
+ 25 250 10
+
+ 21 2 2
+ - 3/40 y DATA(0, 0) - 7/40 y DATA(1, 0) - -- x c32 + 9/50 x c31
+ 10
+
+ 2 3 2 3
+ + 9/100 x y DATA(1, -1) + 1/50 x y DATA(-1, 0)
+
+ 2 3
+ + 1/100 x y DATA(-1, 1) - 1/12 x y DATA(2, 2) + 1/12 x y DATA(1, 2)
+
+ - 1/12 x y DATA(-1, 2) + 1/12 x y DATA(0, 2) + 1/2 x y DATA(2, 1)
+
+ - 1/4 x y DATA(2, 0) - 1/6 x y DATA(2, -1) + 1/4 x y DATA(0, 0)
+
+ 2
+ + 1/4 x y DATA(1, 0) - 1/2 x y DATA(0, 1) + 1/4 x y DATA(2, 1)
+
+ 3
+ - 1/150 x y DATA(1, -1) - 1/2 x y DATA(1, 1) - 1/6 x y DATA(-1, -1)
+
+ + 1/6 x y DATA(0, -1) + 1/6 x y DATA(1, -1) - 1/4 x y DATA(-1, 0)
+
+ 11
+ + 3/20 y DATA(0, 1) + 7/20 y DATA(1, 1) + -- y DATA(-1, -1)
+ 60
+
+ 11
+ - 1/20 y DATA(0, -1) - 7/60 y DATA(1, -1) + -- y DATA(-1, 0)
+ 40
+
+ 11 53 3
+ - -- y DATA(-1, 1) - 1/40 y DATA(2, 0) - ---- y DATA(2, 2)
+ 20 3000
+
+ 409 3 197 3 53 3
+ + ---- y DATA(1, 2) - ---- y DATA(-1, 2) - ---- y DATA(0, 2)
+ 3000 3000 1000
+
+ 31 3 101 3 3
+ - ---- y DATA(2, 1) + ---- y DATA(2, 0) + 7/1500 y DATA(2, -1)
+ 1500 3000
+
+ 101 3 149 3 31 3
+ + ---- y DATA(0, 0) + ---- y DATA(1, 0) - --- y DATA(0, 1)
+ 1000 1000 500
+
+ 47 3 59 3 3
+ - --- y DATA(1, 1) + --- y DATA(-1, -1) + 7/500 y DATA(0, -1)
+ 250 750
+
+ 73 3 851 3 203 3
+ - --- y DATA(1, -1) - ---- y DATA(-1, 0) + --- y DATA(-1, 1)
+ 750 3000 750
+
+ 11
+ - 1/120 y DATA(2, 2) - 7/120 y DATA(1, 2) + --- y DATA(-1, 2)
+ 120
+
+ 2 2
+ - 1/40 y DATA(0, 2) + 1/40 y DATA(2, 1) - 1/20 y DATA(2, 0)
+
+ 2 2 2
+ + 1/40 y DATA(2, -1) - 3/20 y DATA(0, 0) - 7/20 y DATA(1, 0)
+
+ 3 2 3
+ + 7/300 x y DATA(2, 2) + 1/2 x y DATA(0, 0) - 4/75 x y DATA(2, -1)
+
+ 79 3 2 3 2
+ - --- x y DATA(0, 2) - 3/50 x y DATA(-1, 2) - 1/4 x y DATA(1, 1)
+ 300
+
+ 31 3 3 2
+ - --- x y DATA(1, 0) + 7/25 x y DATA(0, 1) - 1/4 x y DATA(0, -1)
+ 100
+
+ 2 3 3 2 3
+ - 3/100 x y DATA(2, -1) - 6/25 x y DATA(2, 1) - 9/50 x y DATA(1, 2)
+
+ 2 2 3 11 3
+ + 1/2 x y DATA(1, 0) - 1/100 x y DATA(2, 1) + -- x y DATA(1, 1)
+ 50
+
+ 19 3 21 2
+ - --- x y DATA(0, 0) + -- x c32 - 9/50 x c31 + 1/4 x y DATA(-1, 1)
+ 100 10
+
+ 2 2
+ - 1/2 x y DATA(2, 0) + 1/2 x y DATA(-1, 1) - 1/4 x y DATA(1, -1)
+
+ 23 3 2 3 2 3
+ + --- x y DATA(-1, 0) - 1/50 x y DATA(2, 0) - 3/100 x y DATA(0, 1)
+ 100
+
+ 2 3 2 3 13 3
+ + 9/50 x y DATA(0, 2) - 3/50 x y DATA(0, 0) + -- x y DATA(0, -1)
+ 75
+
+ 2 2 29 3
+ + 1/4 x y DATA(2, -1) + 1/4 x y DATA(-1, -1) + --- x y DATA(1, 2)
+ 300
+
+ 2 2 3 2 3
+ - 1/4 x y DATA(0, 1) + 3/50 x y DATA(1, 0) + 3/50 x y DATA(2, 2)
+
+ 17 3 13 3 43 3
+ - --- x y DATA(-1, -1) - -- x y DATA(-1, 1) + --- x y DATA(-1, 2)
+ 150 50 300
+
+ 27 3 2 2
+ + --- x y DATA(2, 0) - 1/2 x y DATA(-1, 0) + 3/40 y DATA(0, 1)
+ 100
+
+ 11 2 2 2
+ - -- y DATA(-1, -1) + 3/40 y DATA(0, -1) + 7/40 y DATA(1, -1)
+ 40
+
+ 11 2 11 2 2
+ + -- y DATA(-1, 0) - -- y DATA(-1, 1) + 1/200 x DATA(2, 2)
+ 20 40
+
+ 2 2 2
+ - 3/200 x DATA(1, 2) - 1/200 x DATA(-1, 2) + 3/200 x DATA(0, 2)
+
+ 29 2 33 2 37 2
+ + --- x DATA(2, 1) + --- x DATA(2, 0) + --- x DATA(2, -1)
+ 200 200 200
+
+ 99 2 99 2 87 2
+ + --- x DATA(0, 0) - --- x DATA(1, 0) + --- x DATA(0, 1)
+ 200 200 200
+
+ 87 2 37 2 111 2
+ - --- x DATA(1, 1) - --- x DATA(-1, -1) + --- x DATA(0, -1)
+ 200 200 200
+
+ 111 2 33 2 29 2
+ - --- x DATA(1, -1) - --- x DATA(-1, 0) - --- x DATA(-1, 1)
+ 200 200 200
+
+ 2
+ - 1/200 x DATA(2, 2) + 3/200 x DATA(1, 2) + 7/40 y DATA(1, 1)
+
+ 29
+ + 1/200 x DATA(-1, 2) - 3/200 x DATA(0, 2) - --- x DATA(2, 1)
+ 200
+
+ 67 37 199
+ + --- x DATA(2, 0) - --- x DATA(2, -1) - --- x DATA(0, 0)
+ 200 200 200
+
+ 87 87
+ - 1/200 x DATA(1, 0) - --- x DATA(0, 1) + --- x DATA(1, 1)
+ 200 200
+
+ 37 111 111
+ + --- x DATA(-1, -1) - --- x DATA(0, -1) + --- x DATA(1, -1)
+ 200 200 200
+
+ 133 29 21 3 481
+ + --- x DATA(-1, 0) + --- x DATA(-1, 1) + -- x y c31 + ---- DATA(-1, -1)
+ 200 200 25 6000
+
+ 481 481 957
+ - ---- DATA(0, -1) + ---- DATA(1, -1) - ---- DATA(-1, 0)
+ 2000 2000 2000
+
+ 377 2 3 2 3
+ + ---- DATA(-1, 1) + 3/100 x y DATA(1, 1) + 3/100 x y DATA(-1, -1)
+ 6000
+
+ 2 3
+ - 9/100 x y DATA(0, -1)
+
+> coeffs_as_lc_of_data(%, posn_list_2d_size4);
+bytes used=53061376, alloc=2162292, time=4.05
+ 37 2 2 481 17 3 37 11 2 11
+[COEFF(-1, -1) = - --- x + 1/4 x y + ---- - --- x y + --- x - -- y + -- y
+ 200 6000 150 200 40 60
+
+ 2 3 59 3 3 2
+ - 1/6 x y + 3/100 x y + --- y , COEFF(0, -1) = 7/500 y + 3/40 y
+ 750
+
+ 13 3 111 2 111 2 481
+ + -- x y + 1/6 x y + --- x - --- x - 1/4 x y - 1/20 y - ----
+ 75 200 200 2000
+
+ 2 3 73 3 2 3 3
+ - 9/100 x y , COEFF(1, -1) = - --- y + 9/100 x y - 1/150 x y - 7/60 y
+ 750
+
+ 2 111 481 111 2 2
+ + 1/6 x y + 7/40 y + --- x + ---- - --- x - 1/4 x y , COEFF(2, -1) =
+ 200 2000 200
+
+ 3 2 3 3 2 37 2
+ - 4/75 x y - 1/6 x y - 3/100 x y - 1/60 y + 7/1500 y + 1/40 y + --- x
+ 200
+
+ 2 37 481 33 2 11 851 3
+ + 1/4 x y - --- x - ----, COEFF(-1, 0) = - --- x + -- y - ---- y
+ 200 6000 200 40 3000
+
+ 2 3 11 2 957 23 3 133 2
+ - 1/4 x y + 1/50 x y + -- y - ---- + --- x y + --- x - 1/2 x y ,
+ 20 2000 100 200
+
+ 129 2 3 101 3 19 3 2
+ COEFF(0, 0) = - 3/40 y - ---- - 3/50 x y + ---- y - --- x y + 1/2 x y
+ 2000 1000 100
+
+ 2 199 99 2 31 3
+ - 3/20 y + 1/4 x y - --- x + --- x , COEFF(1, 0) = - --- x y
+ 200 200 100
+
+ 2 3 1129 2 2 99 2 149 3
+ + 3/50 x y + ---- + 1/2 x y - 7/40 y - 7/20 y - --- x + ---- y
+ 2000 200 1000
+
+ 2 33 2 2
+ - 1/200 x + 1/4 x y, COEFF(2, 0) = - 1/40 y - 1/20 y + --- x - 1/2 x y
+ 200
+
+ 27 3 101 3 2 3 43 67
+ + --- x y + ---- y - 1/50 x y - 1/4 x y - ---- + --- x, COEFF(-1, 1)
+ 100 3000 2000 200
+
+ 13 3 11 2 2 377 2 3 203 3 29
+ = - -- x y - -- y + 1/4 x y + ---- + 1/100 x y + --- y + --- x
+ 50 40 6000 750 200
+
+ 29 2 11 2 3 2 87 2
+ - --- x - -- y + 1/2 x y, COEFF(0, 1) = - 3/100 x y - 1/4 x y + --- x
+ 200 20 200
+
+ 2 31 3 3 377 87
+ + 3/40 y - --- y + 7/25 x y + 3/20 y - ---- - --- x - 1/2 x y,
+ 500 2000 200
+
+ 47 3 2 87 2 377
+ COEFF(1, 1) = 7/20 y - --- y - 1/2 x y - 1/4 x y - --- x + ----
+ 250 200 2000
+
+ 2 11 3 87 2 3
+ + 7/40 y + -- x y + --- x + 3/100 x y , COEFF(2, 1) = 1/20 y
+ 50 200
+
+ 2 3 31 3 3 2 2 377 29 2
+ - 1/100 x y - ---- y - 6/25 x y + 1/40 y + 1/4 x y - ---- + --- x
+ 1500 6000 200
+
+ 29 11 2 13 197 3
+ + 1/2 x y - --- x, COEFF(-1, 2) = --- y - 1/200 x + ---- - ---- y
+ 200 120 6000 3000
+
+ 43 3 2 3 53 3
+ + --- x y - 1/12 x y - 3/50 x y + 1/200 x, COEFF(0, 2) = - ---- y
+ 300 1000
+
+ 2 3 13 2 79 3
+ - 1/40 y + 9/50 x y - ---- + 3/200 x - --- x y + 1/12 x y - 3/200 x,
+ 2000 300
+
+ 409 3 2
+ COEFF(1, 2) = 1/12 x y + ---- y - 3/200 x - 7/120 y + 3/200 x
+ 3000
+
+ 2 3 13 29 3 53 3
+ - 9/50 x y + ---- + --- x y , COEFF(2, 2) = - ---- y - 1/120 y
+ 2000 300 3000
+
+ 2 13 2 3 3
+ + 1/200 x - ---- - 1/200 x + 3/50 x y + 7/300 x y - 1/12 x y]
+ 6000
+
+> print_coeffs__lc_of_data(%, "coeffs_dx->coeff_", "fp",
+> "2d.coeffs/2d.cube.order3.smooth0/coeffs-dx.compute.c");
+bytes used=54061732, alloc=2162292, time=4.12
+bytes used=55062064, alloc=2162292, time=4.20
+bytes used=56062456, alloc=2162292, time=4.27
+bytes used=57062648, alloc=2162292, time=4.36
+bytes used=58062912, alloc=2162292, time=4.46
+bytes used=59063180, alloc=2162292, time=4.57
+bytes used=60063412, alloc=2162292, time=4.65
+bytes used=61063624, alloc=2162292, time=4.75
+bytes used=62064392, alloc=2162292, time=4.84
+bytes used=63064556, alloc=2162292, time=4.95
+>
+# d/dy
+> simplify( diff(interp_2d_cube_order3_smooth0,y) );
+bytes used=64064736, alloc=2162292, time=5.12
+bytes used=65064892, alloc=2162292, time=5.17
+ 3 3
+2 c32 x y + c31 x + 1/40 DATA(2, 2) - 3/40 DATA(1, 2) - 1/40 DATA(-1, 2)
+
+ 11
+ - --- DATA(0, 2) - 3/20 DATA(2, 1) + 3/40 DATA(2, 0) + 1/20 DATA(2, -1)
+ 120
+
+ 2 2 3 2
+ + 9/5 c32 x y - 3/20 y DATA(2, 1) - 6/5 c32 x y + 9/10 c31
+
+ 11 11
+ - -- DATA(0, 0) - 9/40 DATA(1, 0) + -- DATA(0, 1) + 9/20 DATA(1, 1)
+ 40 20
+
+ 39 2 27 2 11
+ + -- x y c32 - -- y c32 - 3/20 y DATA(2, -1) - -- y DATA(0, 0)
+ 25 25 10
+
+ 2
+ - 9/10 y DATA(1, 0) - 3/2 x c31 + 1/20 x y DATA(2, 1)
+
+ - 1/10 x y DATA(2, 0) + 1/20 x y DATA(2, -1) - 3/10 x y DATA(0, 0)
+
+ 31 2
+ - 7/10 x y DATA(1, 0) + 3/20 x y DATA(0, 1) - --- x y DATA(2, 1)
+ 500
+
+ 11
+ + 7/20 x y DATA(1, 1) - -- x y DATA(-1, -1) + 3/20 x y DATA(0, -1)
+ 20
+
+ 11 2
+ + 7/20 x y DATA(1, -1) + -- x y DATA(-1, 0) + 1/4 x y DATA(2, -1)
+ 10
+
+ 2 2 2
+ + 1/2 x y DATA(0, 0) + 1/2 x y DATA(1, 0) - 1/4 x y DATA(0, 1)
+
+ 2 2 2
+ - 1/4 x y DATA(1, 1) + 1/4 x y DATA(-1, -1) - 1/4 x y DATA(0, -1)
+
+ 2 2 2
+ - 1/4 x y DATA(1, -1) - 1/2 x y DATA(-1, 0) + 1/4 x y DATA(-1, 1)
+
+ 3 2 3 2 3 2
+ - 9/50 x y DATA(1, 2) - 3/50 x y DATA(-1, 2) + 9/50 x y DATA(0, 2)
+
+ 3 2 3 2 3 2
+ - 1/100 x y DATA(2, 1) - 1/50 x y DATA(2, 0) + 3/50 x y DATA(2, 2)
+
+ 3 2 3 2
+ - 9/100 x y DATA(0, -1) - 3/100 x y DATA(2, -1)
+
+ 3 2 3 2 93 2 2
+ - 3/50 x y DATA(0, 0) + 3/50 x y DATA(1, 0) - --- x y DATA(1, 0)
+ 200
+
+ 21 2 2 3 2 3 2
+ + -- x y DATA(0, 1) - 3/100 x y DATA(0, 1) + 3/100 x y DATA(1, 1)
+ 50
+
+ 3 2 2 2 81 2 2
+ + 3/100 x y DATA(-1, -1) - 9/25 x y DATA(2, 1) + --- x y DATA(2, 0)
+ 200
+
+ 2 2 57 2 2 3 2
+ - 2/25 x y DATA(2, -1) - --- x y DATA(0, 0) + 1/100 x y DATA(-1, 1)
+ 200
+
+ 29 2 2 43 2 2 79 2 2
+ + --- x y DATA(1, 2) + --- x y DATA(-1, 2) - --- x y DATA(0, 2)
+ 200 200 200
+
+ 2 2 33 2 2 13 2 2
+ + 7/200 x y DATA(2, 2) + --- x y DATA(1, 1) + -- x y DATA(0, -1)
+ 100 50
+
+ 2 2 69 2 2 17 2 2
+ - 1/100 x y DATA(1, -1) + --- x y DATA(-1, 0) - --- x y DATA(-1, -1)
+ 200 100
+
+ 3 2 3 2 53 2
+ + 9/100 x y DATA(1, -1) + 1/50 x y DATA(-1, 0) - ---- x y DATA(2, 2)
+ 1000
+
+ 39 2 2 409 2 197 2
+ - --- x y DATA(-1, 1) + ---- x y DATA(1, 2) - ---- x y DATA(-1, 2)
+ 100 1000 1000
+
+ 159 2 11
+ - ---- x y DATA(0, 2) + -- y DATA(0, 1) + 9/20 y DATA(1, 1)
+ 1000 20
+
+ 11
+ + 3/20 y DATA(-1, -1) + -- y DATA(0, -1) + 9/20 y DATA(1, -1)
+ 20
+
+ - 3/10 y DATA(-1, 0) + 3/20 y DATA(-1, 1) + 3/10 y DATA(2, 0)
+
+ 27 2 243 2 2
+ + --- y DATA(2, 1) - ---- y DATA(2, 0) + 6/125 y DATA(2, -1)
+ 125 1000
+
+ 771 2 729 2 21 2
+ + ---- y DATA(0, 0) + ---- y DATA(1, 0) - ---- y DATA(2, 2)
+ 1000 1000 1000
+
+ 63 2 21 2 437 2
+ + ---- y DATA(1, 2) + ---- y DATA(-1, 2) + ---- y DATA(0, 2)
+ 1000 1000 1000
+
+ 2 2 189 2 273 2
+ + 1/4 x y DATA(2, 1) - 1/2 x y DATA(2, 0) - --- y c31 + --- x y c31
+ 250 250
+
+ 63 2 2 21 3 2 303 2
+ + 9/5 y c32 + -- x y c31 - -- x y c31 + ---- x y DATA(0, 0)
+ 50 25 1000
+
+ 141 2 21 2 447 2
+ - --- x y DATA(1, 1) + --- x y DATA(0, -1) + ---- x y DATA(1, 0)
+ 250 500 1000
+
+ 13 2 203 2
+ - 13/5 x y c32 - -- x c31 - 3 x y c32 + --- x y DATA(-1, 1)
+ 10 250
+
+ 101 2 11 73 2
+ + ---- x y DATA(2, 0) - -- x y DATA(-1, 1) - --- x y DATA(1, -1)
+ 1000 20 250
+
+ 2 59 2 93 2
+ + 7/500 x y DATA(2, -1) + --- x y DATA(-1, -1) - --- x y DATA(0, 1)
+ 250 500
+
+ 851 2 213 2 2
+ - ---- x y DATA(-1, 0) - --- y DATA(0, 1) - 6/125 y DATA(-1, -1)
+ 1000 250
+
+ 89 2 18 2 243 2
+ - --- y DATA(0, -1) - --- y DATA(1, -1) + ---- y DATA(-1, 0)
+ 250 125 1000
+
+ 27 2 2 2
+ - --- y DATA(-1, 1) - 1/24 x DATA(2, 2) + 1/24 x DATA(1, 2)
+ 125
+
+ 2 2 2
+ - 1/24 x DATA(-1, 2) + 1/24 x DATA(0, 2) + 1/4 x DATA(2, 1)
+
+ 2 2 2
+ - 1/8 x DATA(2, 0) - 1/12 x DATA(2, -1) + 1/8 x DATA(0, 0)
+
+ 2 2 2
+ + 1/8 x DATA(1, 0) - 1/4 x DATA(0, 1) - 1/4 x DATA(1, 1)
+
+ 2 2 2
+ - 1/12 x DATA(-1, -1) + 1/12 x DATA(0, -1) + 1/12 x DATA(1, -1)
+
+ 2 2
+ - 1/8 x DATA(-1, 0) + 1/4 x DATA(-1, 1) - 1/120 x DATA(2, 2)
+
+ 81 2 11
+ - 7/120 x DATA(1, 2) - --- y DATA(1, 1) + --- x DATA(-1, 2)
+ 125 120
+
+ - 1/40 x DATA(0, 2) + 1/20 x DATA(2, 1) - 1/40 x DATA(2, 0)
+
+ - 1/60 x DATA(2, -1) - 3/40 x DATA(0, 0) - 7/40 x DATA(1, 0)
+
+ 11
+ + 3/20 x DATA(0, 1) + 7/20 x DATA(1, 1) + -- x DATA(-1, -1)
+ 60
+
+ 11
+ - 1/20 x DATA(0, -1) - 7/60 x DATA(1, -1) + -- x DATA(-1, 0)
+ 40
+
+ 11 11
+ - -- x DATA(-1, 1) - 1/20 DATA(-1, -1) - -- DATA(0, -1) - 3/20 DATA(1, -1)
+ 20 60
+
+ - 3/40 DATA(-1, 0) + 3/20 DATA(-1, 1)
+
+> coeffs_as_lc_of_data(%, posn_list_2d_size4);
+bytes used=66073540, alloc=2162292, time=5.24
+ 17 2 2 3 2 11 59 2
+[COEFF(-1, -1) = - --- x y - 1/20 + 3/100 x y + -- x + --- x y + 3/20 y
+ 100 60 250
+
+ 2 2 2 11 2
+ - 6/125 y - 1/12 x + 1/4 x y - -- x y, COEFF(0, -1) = 1/12 x
+ 20
+
+ 2 13 2 2 11 21 2 11
+ - 1/4 x y - 1/20 x + -- x y + 3/20 x y + -- y + --- x y - --
+ 50 20 500 60
+
+ 3 2 89 2 2 2 2
+ - 9/100 x y - --- y , COEFF(1, -1) = - 3/20 - 1/4 x y - 1/100 x y
+ 250
+
+ 18 2 2 3 2 73 2
+ + 9/20 y + 7/20 x y - --- y + 1/12 x - 7/60 x + 9/100 x y - --- x y ,
+ 125 250
+
+ 2 2 2 3 2
+ COEFF(2, -1) = 1/4 x y - 1/60 x + 1/20 - 2/25 x y - 3/100 x y
+
+ 2 2 2
+ + 7/500 x y + 1/20 x y + 6/125 y - 1/12 x - 3/20 y, COEFF(-1, 0) =
+
+ 11 851 2 2 69 2 2 3 2
+ - 3/40 + -- x y - ---- x y - 1/2 x y - 3/10 y + --- x y + 1/50 x y
+ 10 1000 200
+
+ 11 2 243 2 2 303 2 11
+ + -- x - 1/8 x + ---- y , COEFF(0, 0) = 1/8 x + ---- x y - -- y
+ 40 1000 1000 10
+
+ 3 2 11 2 771 2 57 2 2
+ - 3/50 x y - -- + 1/2 x y - 3/40 x + ---- y - --- x y - 3/10 x y,
+ 40 1000 200
+
+ 93 2 2 3 2 2
+ COEFF(1, 0) = - --- x y + 3/50 x y - 7/10 x y - 9/10 y + 1/2 x y
+ 200
+
+ 447 2 2 729 2
+ + ---- x y + 1/8 x + ---- y - 7/40 x - 9/40, COEFF(2, 0) = 3/40
+ 1000 1000
+
+ 2 81 2 2 2 101 2 243 2
+ - 1/2 x y + --- x y - 1/40 x - 1/8 x + ---- x y - ---- y - 1/10 x y
+ 200 1000 1000
+
+ 3 2 39 2 2 2 27 2
+ + 3/10 y - 1/50 x y , COEFF(-1, 1) = - --- x y + 3/20 + 1/4 x - --- y
+ 100 125
+
+ 3 2 11 203 2 11 2
+ + 1/100 x y + 3/20 y - -- x + --- x y - -- x y + 1/4 x y, COEFF(0, 1)
+ 20 250 20
+
+ 213 2 11 11 21 2 2 93 2 3 2
+ = - --- y + -- + -- y + -- x y - --- x y - 3/100 x y + 3/20 x
+ 250 20 20 50 500
+
+ 2 2 2 33 2 2
+ - 1/4 x y - 1/4 x + 3/20 x y, COEFF(1, 1) = 9/20 y - 1/4 x + --- x y
+ 100
+
+ 81 2 2 141 2 3 2
+ - --- y + 7/20 x - 1/4 x y - --- x y + 9/20 + 7/20 x y + 3/100 x y ,
+ 125 250
+
+ 3 2
+ COEFF(2, 1) = - 1/100 x y - 3/20 + 1/20 x + 1/20 x y - 3/20 y
+
+ 2 2 31 2 2 2 27 2
+ - 9/25 x y - --- x y + 1/4 x + 1/4 x y + --- y , COEFF(-1, 2) =
+ 500 125
+
+ 2 197 2 11 3 2 43 2 2 21 2
+ - 1/40 - 1/24 x - ---- x y + --- x - 3/50 x y + --- x y + ---- y ,
+ 1000 120 200 1000
+
+ COEFF(0, 2) =
+
+ 79 2 2 159 2 3 2 2 11 437 2
+ - --- x y - 1/40 x - ---- x y + 9/50 x y + 1/24 x - --- + ---- y ,
+ 200 1000 120 1000
+
+ COEFF(1, 2) =
+
+ 29 2 2 3 2 2 63 2 409 2
+ - 3/40 + --- x y - 7/120 x - 9/50 x y + 1/24 x + ---- y + ---- x y ,
+ 200 1000 1000
+
+ COEFF(2, 2) =
+
+ 21 2 2 2 2 3 2 53 2
+ 1/40 - ---- y - 1/24 x + 7/200 x y - 1/120 x + 3/50 x y - ---- x y ]
+ 1000 1000
+
+> print_coeffs__lc_of_data(%, "coeffs_dy->coeff_", "fp",
+> "2d.coeffs/2d.cube.order3.smooth0/coeffs-dy.compute.c");
+bytes used=67073904, alloc=2162292, time=5.31
+bytes used=68074096, alloc=2162292, time=5.38
+bytes used=69074392, alloc=2162292, time=5.48
+bytes used=70074612, alloc=2162292, time=5.54
+bytes used=71074776, alloc=2162292, time=5.66
+bytes used=72075172, alloc=2162292, time=5.73
+bytes used=73075452, alloc=2162292, time=5.83
+bytes used=74076084, alloc=2162292, time=5.90
+bytes used=75076284, alloc=2162292, time=6.00
+bytes used=76076484, alloc=2162292, time=6.08
+bytes used=77083384, alloc=2162292, time=6.19
+bytes used=78083548, alloc=2162292, time=6.27
+bytes used=79083664, alloc=2162292, time=6.41
+bytes used=80083872, alloc=2162292, time=6.49
+bytes used=81084148, alloc=2162292, time=6.63
+bytes used=82084408, alloc=2162292, time=6.75
+>
+# d^2/dx^2
+> simplify( diff(interp_2d_cube_order3_smooth0,x,x) );
+bytes used=83085440, alloc=2162292, time=6.83
+6 c31 x y - 1/200 DATA(2, 2) + 3/200 DATA(1, 2) + 1/200 DATA(-1, 2)
+
+ 29 67 37
+ - 3/200 DATA(0, 2) - --- DATA(2, 1) + --- DATA(2, 0) - --- DATA(2, -1)
+ 200 200 200
+
+ 29 3 3
+ + 1/2 y DATA(2, 1) + --- y DATA(1, 2) + 7/300 y DATA(2, 2)
+ 300
+
+ 11 3 3 21
+ + -- y DATA(1, 1) + 1/25 x y DATA(-1, 0) + -- c32 - 9/50 c31
+ 50 10
+
+ 199 87 87
+ - --- DATA(0, 0) - 1/200 DATA(1, 0) - --- DATA(0, 1) + --- DATA(1, 1)
+ 200 200 200
+
+ 2 2
+ + 6 x y c32 - 3 y c32 - 21/5 x c32 - 1/6 y DATA(2, -1)
+
+ + 1/4 y DATA(0, 0) + 1/4 y DATA(1, 0) - 1/2 y DATA(0, 1)
+
+ - 1/2 y DATA(1, 1) - 1/6 y DATA(-1, -1) + 1/6 y DATA(0, -1)
+
+ + 1/6 y DATA(1, -1) - 1/4 y DATA(-1, 0) + 1/2 y DATA(-1, 1)
+
+ 3 19 3
+ - 1/4 y DATA(2, 0) + 7/25 y DATA(0, 1) - --- y DATA(0, 0)
+ 100
+
+ 3 27 3 3
+ - 4/75 y DATA(2, -1) + --- y DATA(2, 0) - 6/25 y DATA(2, 1)
+ 100
+
+ 79 3 13 3 23 3
+ - --- y DATA(0, 2) - -- y DATA(-1, 1) + --- y DATA(-1, 0)
+ 300 50 100
+
+ 3 13 3 17 3
+ - 1/150 y DATA(1, -1) + -- y DATA(0, -1) - --- y DATA(-1, -1)
+ 75 150
+
+ 31 3 2 2
+ - --- y DATA(1, 0) + 1/4 y DATA(2, 1) - 1/2 y DATA(2, 0)
+ 100
+
+ 2 2 2
+ + 1/4 y DATA(2, -1) + 1/2 y DATA(0, 0) + 1/2 y DATA(1, 0) + 9/25 x c31
+
+ 2 2 2
+ - 3 y c31 - 1/4 y DATA(0, 1) + 1/4 y DATA(-1, -1) - 1/4 y DATA(0, -1)
+
+ 2 2 2
+ - 1/4 y DATA(1, -1) - 1/2 y DATA(-1, 0) + 1/4 y DATA(-1, 1)
+
+ 2
+ + 1/100 x DATA(2, 2) - 3/100 x DATA(1, 2) - 1/4 y DATA(1, 1)
+
+ 29
+ - 1/100 x DATA(-1, 2) + 3/100 x DATA(0, 2) + --- x DATA(2, 1)
+ 100
+
+ 33 37 99
+ + --- x DATA(2, 0) + --- x DATA(2, -1) + --- x DATA(0, 0)
+ 100 100 100
+
+ 99 87 87
+ - --- x DATA(1, 0) + --- x DATA(0, 1) - --- x DATA(1, 1)
+ 100 100 100
+
+ 37 111 111
+ - --- x DATA(-1, -1) + --- x DATA(0, -1) - --- x DATA(1, -1)
+ 100 100 100
+
+ 33 29 21 3 3
+ - --- x DATA(-1, 0) - --- x DATA(-1, 1) + -- y c31 + 6/5 y c32
+ 100 100 25
+
+ 37 111 111 133
+ + --- DATA(-1, -1) - --- DATA(0, -1) + --- DATA(1, -1) + --- DATA(-1, 0)
+ 200 200 200 200
+
+ 29 42 3 3 3
+ + --- DATA(-1, 1) - -- x y c31 - 12/5 x y c32 - 9/50 x y DATA(0, -1)
+ 200 25
+
+ 3 3 3
+ + 9/50 x y DATA(1, -1) + 1/50 x y DATA(-1, 1) + 3/25 x y DATA(2, 2)
+
+ 3 3 3
+ - 9/25 x y DATA(1, 2) - 3/25 x y DATA(-1, 2) + 9/25 x y DATA(0, 2)
+
+ 3 3 3
+ - 1/50 x y DATA(2, 1) - 1/25 x y DATA(2, 0) - 3/50 x y DATA(2, -1)
+
+ 3 3 3
+ - 3/25 x y DATA(0, 0) + 3/25 x y DATA(1, 0) - 3/50 x y DATA(0, 1)
+
+ 3 3
+ + 3/50 x y DATA(1, 1) + 3/50 x y DATA(-1, -1) - 1/12 y DATA(2, 2)
+
+ + 1/12 y DATA(1, 2) - 1/12 y DATA(-1, 2) + 1/12 y DATA(0, 2)
+
+ 43 3
+ + --- y DATA(-1, 2)
+ 300
+
+> coeffs_as_lc_of_data(%, posn_list_2d_size4);
+ 37 2 17 3 3 37
+[COEFF(-1, -1) = - --- x + 1/4 y - --- y + 3/50 x y - 1/6 y + ---,
+ 100 150 200
+
+ 111 2 13 3 3 111
+ COEFF(0, -1) = - --- - 1/4 y + 1/6 y + -- y - 9/50 x y + --- x,
+ 200 75 100
+
+ 3 111 111 2 3
+ COEFF(1, -1) = 9/50 x y + --- - --- x - 1/4 y - 1/150 y + 1/6 y,
+ 200 100
+
+ 37 2 3 3 37
+ COEFF(2, -1) = - --- + 1/4 y - 1/6 y - 4/75 y - 3/50 x y + --- x,
+ 200 100
+
+ 23 3 133 2 33 3
+ COEFF(-1, 0) = --- y + --- - 1/4 y - 1/2 y - --- x + 1/25 x y ,
+ 100 200 100
+
+ 199 19 3 99 2 3
+ COEFF(0, 0) = 1/4 y - --- - --- y + --- x + 1/2 y - 3/25 x y ,
+ 200 100 100
+
+ 2 3 99 31 3
+ COEFF(1, 0) = 1/4 y + 1/2 y + 3/25 x y - --- x - 1/200 - --- y ,
+ 100 100
+
+ 33 67 3 2 27 3
+ COEFF(2, 0) = --- x + --- - 1/25 x y - 1/2 y - 1/4 y + --- y ,
+ 100 200 100
+
+ 29 13 3 3 29 2
+ COEFF(-1, 1) = - --- x - -- y + 1/50 x y + --- + 1/4 y + 1/2 y,
+ 100 50 200
+
+ 2 87 3 87 3
+ COEFF(0, 1) = - 1/4 y - --- - 1/2 y - 3/50 x y + --- x + 7/25 y ,
+ 200 100
+
+ 87 3 2 87 11 3
+ COEFF(1, 1) = - --- x + 3/50 x y - 1/4 y + --- - 1/2 y + -- y ,
+ 100 200 50
+
+ 3 29 2 3 29
+ COEFF(2, 1) = - 6/25 y + --- x + 1/4 y - 1/50 x y - --- + 1/2 y,
+ 100 200
+
+ 43 3 3
+ COEFF(-1, 2) = --- y - 1/100 x - 3/25 x y - 1/12 y + 1/200,
+ 300
+
+ 79 3 3
+ COEFF(0, 2) = 3/100 x - --- y - 3/200 + 1/12 y + 9/25 x y ,
+ 300
+
+ 29 3 3
+ COEFF(1, 2) = - 3/100 x + --- y + 3/200 - 9/25 x y + 1/12 y,
+ 300
+
+ 3 3
+ COEFF(2, 2) = 1/100 x - 1/200 + 3/25 x y + 7/300 y - 1/12 y]
+
+> print_coeffs__lc_of_data(%, "coeffs_dxx->coeff_", "fp",
+> "2d.coeffs/2d.cube.order3.smooth0/coeffs-dxx.compute.c");
+bytes used=84085660, alloc=2162292, time=6.91
+bytes used=85085812, alloc=2162292, time=6.99
+bytes used=86086048, alloc=2162292, time=7.09
+bytes used=87086364, alloc=2162292, time=7.18
+bytes used=88086596, alloc=2162292, time=7.29
+bytes used=89086816, alloc=2162292, time=7.43
+>
+# d^2/dxdy
+> simplify( diff(interp_2d_cube_order3_smooth0,x,y) );
+bytes used=90086976, alloc=2162292, time=7.50
+ 2 2 11
+3 c31 x + 6 c32 x y - 1/120 DATA(2, 2) - 7/120 DATA(1, 2) + --- DATA(-1, 2)
+ 120
+
+ - 1/40 DATA(0, 2) + 1/20 DATA(2, 1) - 1/40 DATA(2, 0) - 1/60 DATA(2, -1)
+
+ 13
+ + 1/20 y DATA(2, 1) - -- c31 - 3/40 DATA(0, 0) - 7/40 DATA(1, 0)
+ 10
+
+ 2 39 2
+ + 3/20 DATA(0, 1) + 7/20 DATA(1, 1) + 18/5 x y c32 + -- y c32
+ 25
+
+ + 1/2 x y DATA(2, -1) + 1/20 y DATA(2, -1) - 3/10 y DATA(0, 0)
+
+ - 7/10 y DATA(1, 0) + 3/20 y DATA(0, 1) + 7/20 y DATA(1, 1)
+
+ 11
+ - -- y DATA(-1, -1) + 3/20 y DATA(0, -1) + 7/20 y DATA(1, -1)
+ 20
+
+ 11 11
+ + -- y DATA(-1, 0) - -- y DATA(-1, 1) - 1/10 y DATA(2, 0)
+ 10 20
+
+ 31 2 101 2 2
+ - --- y DATA(2, 1) + ---- y DATA(2, 0) + 7/500 y DATA(2, -1)
+ 500 1000
+
+ 303 2 447 2 93 2
+ + ---- y DATA(0, 0) + ---- y DATA(1, 0) - 3 x c31 - --- y DATA(0, 1)
+ 1000 1000 500
+
+ 59 2 21 2 73 2
+ + --- y DATA(-1, -1) + --- y DATA(0, -1) - --- y DATA(1, -1)
+ 250 500 250
+
+ 851 2 203 2
+ - ---- y DATA(-1, 0) + --- y DATA(-1, 1) - 1/12 x DATA(2, 2)
+ 1000 250
+
+ 141 2
+ + 1/12 x DATA(1, 2) - --- y DATA(1, 1) - 1/12 x DATA(-1, 2)
+ 250
+
+ + 1/12 x DATA(0, 2) + 1/2 x DATA(2, 1) - 1/4 x DATA(2, 0)
+
+ - 1/6 x DATA(2, -1) + 1/4 x DATA(0, 0) + 1/4 x DATA(1, 0)
+
+ - 1/2 x DATA(0, 1) - 1/2 x DATA(1, 1) - 1/6 x DATA(-1, -1)
+
+ + 1/6 x DATA(0, -1) + 1/6 x DATA(1, -1) - 1/4 x DATA(-1, 0)
+
+ 2 2 2 2
+ + 1/2 x DATA(-1, 1) + 3/100 x y DATA(-1, 1) + 3/50 x y DATA(-1, 0)
+
+ 27 2 2 2 2 2
+ + --- x y DATA(1, -1) + 7/100 x y DATA(2, 2) - 3/100 x y DATA(2, 1)
+ 100
+
+ 2 2 2 2 2 2
+ - 9/50 x y DATA(0, 0) + 9/100 x y DATA(1, 1) - 9/100 x y DATA(0, 1)
+
+ 27 2 2 2 2 2 2
+ - --- x y DATA(0, -1) + 9/100 x y DATA(-1, -1) + 9/50 x y DATA(1, 0)
+ 100
+
+ 43 2 79 2 18 2
+ + --- x y DATA(-1, 2) - --- x y DATA(0, 2) - -- x y DATA(2, 1)
+ 100 100 25
+
+ 2 2 27 2 2 2 2
+ + 9/50 x y DATA(2, 2) + -- x y DATA(0, 2) - 9/50 x y DATA(-1, 2)
+ 50
+
+ 27 2 2 2 2 2 2
+ - -- x y DATA(1, 2) - 9/100 x y DATA(2, -1) - 3/50 x y DATA(2, 0)
+ 50
+
+ 13 2 81 2 2
+ + -- x y DATA(0, -1) + --- x y DATA(2, 0) - 4/25 x y DATA(2, -1)
+ 25 100
+
+ 57 2 29 2 2
+ - --- x y DATA(0, 0) + --- x y DATA(1, 2) - 1/50 x y DATA(1, -1)
+ 100 100
+
+ 69 2 39 2
+ + --- x y DATA(-1, 0) - -- x y DATA(-1, 1) + 1/2 x y DATA(2, 1)
+ 100 50
+
+ 93 2 21 2
+ - x y DATA(2, 0) - --- x y DATA(1, 0) + -- x y DATA(0, 1)
+ 100 25
+
+ 33 2 17 2
+ + -- x y DATA(1, 1) - -- x y DATA(-1, -1) + 1/2 x y DATA(-1, -1)
+ 50 50
+
+ - 1/2 x y DATA(1, -1) - x y DATA(-1, 0) + 1/2 x y DATA(-1, 1)
+
+ - 1/2 x y DATA(0, -1) + x y DATA(0, 0) + x y DATA(1, 0)
+
+ 159 2
+ - 1/2 x y DATA(0, 1) - 1/2 x y DATA(1, 1) - ---- y DATA(0, 2)
+ 1000
+
+ 409 2 53 2 197 2
+ + ---- y DATA(1, 2) - ---- y DATA(2, 2) - ---- y DATA(-1, 2)
+ 1000 1000 1000
+
+ 63 2 273 2 2 2 11
+ - 6 x y c32 + -- x y c31 + --- y c31 - 18/5 c32 x y + -- DATA(-1, -1)
+ 25 250 60
+
+ 11 11
+ - 1/20 DATA(0, -1) - 7/60 DATA(1, -1) + -- DATA(-1, 0) - -- DATA(-1, 1)
+ 40 20
+
+ 63 2 2
+ - 13/5 y c32 - -- x y c31
+ 25
+
+> coeffs_as_lc_of_data(%, posn_list_2d_size4);
+ 11 17 2 59 2 2 2 11
+[COEFF(-1, -1) = - -- y - 1/6 x - -- x y + 1/2 x y + --- y + 9/100 x y + --
+ 20 50 250 60
+
+ , COEFF(0, -1) =
+
+ 21 2 13 2 27 2 2
+ - 1/20 + 1/6 x - 1/2 x y + --- y + -- x y + 3/20 y - --- x y ,
+ 500 25 100
+
+ COEFF(1, -1) =
+
+ 2 73 2 27 2 2
+ - 1/2 x y - 1/50 x y + 1/6 x - 7/60 - --- y + --- x y + 7/20 y,
+ 250 100
+
+ COEFF(2, -1) =
+
+ 2 2 2 2
+ 1/2 x y + 1/20 y - 9/100 x y - 4/25 x y - 1/6 x - 1/60 + 7/500 y ,
+
+ 851 2 2 2 11 11 69 2
+ COEFF(-1, 0) = -x y - ---- y + 3/50 x y - 1/4 x + -- + -- y + --- x y ,
+ 1000 40 10 100
+
+ COEFF(0, 0) =
+
+ 57 2 2 2 303 2
+ - --- x y - 9/50 x y + x y + ---- y + 1/4 x - 3/10 y - 3/40,
+ 100 1000
+
+ 447 2 93 2 2 2
+ COEFF(1, 0) = 1/4 x + ---- y - --- x y + 9/50 x y + x y - 7/10 y - 7/40
+ 1000 100
+
+ , COEFF(2, 0) =
+
+ 101 2 2 2 81 2
+ -x y + ---- y - 1/4 x - 1/40 - 3/50 x y + --- x y - 1/10 y,
+ 1000 100
+
+ 203 2 11 11 39 2 2 2
+ COEFF(-1, 1) = --- y - -- + 1/2 x - -- y - -- x y + 3/100 x y + 1/2 x y
+ 250 20 20 50
+
+ , COEFF(0, 1) =
+
+ 93 2 21 2 2 2
+ 3/20 + 3/20 y - 1/2 x y - --- y + -- x y - 1/2 x - 9/100 x y ,
+ 500 25
+
+ COEFF(1, 1) =
+
+ 33 2 141 2 2 2
+ - 1/2 x + -- x y - --- y + 7/20 - 1/2 x y + 7/20 y + 9/100 x y ,
+ 50 250
+
+ COEFF(2, 1) =
+
+ 2 2 31 2 18 2
+ - 3/100 x y + 1/2 x y + 1/20 + 1/2 x - --- y + 1/20 y - -- x y ,
+ 500 25
+
+ 197 2 43 2 11 2 2
+ COEFF(-1, 2) = - 1/12 x - ---- y + --- x y + --- - 9/50 x y ,
+ 1000 100 120
+
+ 159 2 27 2 2 79 2
+ COEFF(0, 2) = - 1/40 - ---- y + -- x y + 1/12 x - --- x y ,
+ 1000 50 100
+
+ 27 2 2 29 2 409 2
+ COEFF(1, 2) = 1/12 x - -- x y + --- x y + ---- y - 7/120,
+ 50 100 1000
+
+ 53 2 2 2 2
+ COEFF(2, 2) = - ---- y - 1/12 x - 1/120 + 9/50 x y + 7/100 x y ]
+ 1000
+
+> print_coeffs__lc_of_data(%, "coeffs_dxy->coeff_", "fp",
+> "2d.coeffs/2d.cube.order3.smooth0/coeffs-dxy.compute.c");
+bytes used=91087448, alloc=2162292, time=7.56
+bytes used=92087608, alloc=2162292, time=7.64
+bytes used=93087776, alloc=2162292, time=7.70
+bytes used=94088036, alloc=2162292, time=7.82
+bytes used=95088216, alloc=2162292, time=7.92
+bytes used=96088436, alloc=2162292, time=8.04
+bytes used=97088696, alloc=2162292, time=8.16
+>
+# d^2/dy^2
+> simplify( diff(interp_2d_cube_order3_smooth0,y,y) );
+bytes used=98091880, alloc=2162292, time=8.28
+ 2
+18/5 c32 x y - 3/20 DATA(2, 1) + 3/10 DATA(2, 0) - 3/20 DATA(2, -1)
+
+ 3 54 42 3 3
+ - 12/5 c32 x y + --- y DATA(2, 1) - -- c31 x y + 2 c32 x + 9/5 c32
+ 125 25
+
+ 11 11
+ - -- DATA(0, 0) - 9/10 DATA(1, 0) + -- DATA(0, 1) + 9/20 DATA(1, 1)
+ 10 20
+
+ 63 2 273 189 2
+ - 13/5 x c32 + -- x y c31 + --- x y c31 - --- y c31 - 3 x c32
+ 25 125 125
+
+ 81 2 2 57 2
+ + --- x y DATA(2, 0) - 4/25 x y DATA(2, -1) - --- x y DATA(0, 0)
+ 100 100
+
+ 93 2 21 2 33 2
+ - --- x y DATA(1, 0) + -- x y DATA(0, 1) + -- x y DATA(1, 1)
+ 100 25 50
+
+ 17 2 13 2 2
+ - -- x y DATA(-1, -1) + -- x y DATA(0, -1) - 1/50 x y DATA(1, -1)
+ 50 25
+
+ 53 409
+ + 7/250 x y DATA(2, -1) - --- x y DATA(2, 2) + --- x y DATA(1, 2)
+ 500 500
+
+ 197 159 3
+ - --- x y DATA(-1, 2) - --- x y DATA(0, 2) + 3/25 x y DATA(2, 2)
+ 500 500
+
+ 3 3 3
+ - 9/25 x y DATA(1, 2) - 3/25 x y DATA(-1, 2) + 9/25 x y DATA(0, 2)
+
+ 3 3 3
+ - 1/50 x y DATA(2, 1) - 1/25 x y DATA(2, 0) - 3/50 x y DATA(2, -1)
+
+ 3 437 12
+ - 3/25 x y DATA(0, 0) + --- y DATA(0, 2) + --- y DATA(2, -1)
+ 500 125
+
+ 771 729 213
+ + --- y DATA(0, 0) + --- y DATA(1, 0) - --- y DATA(0, 1)
+ 500 500 125
+
+ 162 12 89
+ - --- y DATA(1, 1) - --- y DATA(-1, -1) - --- y DATA(0, -1)
+ 125 125 125
+
+ 36 243 54
+ - --- y DATA(1, -1) + --- y DATA(-1, 0) - --- y DATA(-1, 1)
+ 125 500 125
+
+ 243 3 3
+ - --- y DATA(2, 0) + 3/25 x y DATA(1, 0) - 3/50 x y DATA(0, 1)
+ 500
+
+ 3 3 3
+ + 3/50 x y DATA(1, 1) + 3/50 x y DATA(-1, -1) + 9/50 x y DATA(1, -1)
+
+ 3 3 3
+ + 1/25 x y DATA(-1, 0) + 1/50 x y DATA(-1, 1) - 9/50 x y DATA(0, -1)
+
+ 29 2 2 79 2
+ + --- x y DATA(1, 2) + 7/100 x y DATA(2, 2) - --- x y DATA(0, 2)
+ 100 100
+
+ 43 2 18 2 2
+ + --- x y DATA(-1, 2) - -- x y DATA(2, 1) + 1/4 x DATA(2, 1)
+ 100 25
+
+ 2 2 2
+ - 1/2 x DATA(2, 0) + 1/4 x DATA(2, -1) + 1/2 x DATA(0, 0)
+
+ 2 2 2
+ + 1/2 x DATA(1, 0) - 1/4 x DATA(0, 1) - 1/4 x DATA(1, 1)
+
+ 2 21 63
+ + 1/4 x DATA(-1, -1) - --- y DATA(2, 2) + --- y DATA(1, 2)
+ 500 500
+
+ 21 2 2
+ + --- y DATA(-1, 2) + 1/4 x DATA(-1, 1) - 1/4 x DATA(0, -1)
+ 500
+
+ 2 2 69 2
+ - 1/2 x DATA(-1, 0) - 1/4 x DATA(1, -1) + --- x y DATA(-1, 0)
+ 100
+
+ 39 2
+ - -- x y DATA(-1, 1) + 1/20 x DATA(2, 1) - 1/10 x DATA(2, 0)
+ 50
+
+ + 1/20 x DATA(2, -1) - 3/10 x DATA(0, 0) - 7/10 x DATA(1, 0)
+
+ 11
+ + 3/20 x DATA(0, 1) + 7/20 x DATA(1, 1) - -- x DATA(-1, -1)
+ 20
+
+ 11
+ + 3/20 x DATA(0, -1) + 7/20 x DATA(1, -1) + -- x DATA(-1, 0)
+ 10
+
+ 11 31 101
+ - -- x DATA(-1, 1) - --- x y DATA(2, 1) + --- x y DATA(2, 0)
+ 20 250 500
+
+ 59 73 851
+ + --- x y DATA(-1, -1) - --- x y DATA(1, -1) - --- x y DATA(-1, 0)
+ 125 125 500
+
+ 203 21 303
+ + --- x y DATA(-1, 1) + --- x y DATA(0, -1) + --- x y DATA(0, 0)
+ 125 250 500
+
+ 447 93 141
+ + --- x y DATA(1, 0) - --- x y DATA(0, 1) - --- x y DATA(1, 1)
+ 500 250 125
+
+ 78 11
+ + -- x y c32 + 3/20 DATA(-1, -1) + -- DATA(0, -1) + 9/20 DATA(1, -1)
+ 25 20
+
+ 54
+ - 3/10 DATA(-1, 0) + 3/20 DATA(-1, 1) - -- y c32
+ 25
+
+> coeffs_as_lc_of_data(%, posn_list_2d_size4);
+bytes used=99092352, alloc=2227816, time=8.34
+ 2 12 3 59 11 17 2
+[COEFF(-1, -1) = 1/4 x - --- y + 3/50 y x + --- x y - -- x + 3/20 - -- y x ,
+ 125 125 20 50
+
+ 21 13 2 3 89 11 2
+ COEFF(0, -1) = --- x y + -- y x - 9/50 y x - --- y + -- + 3/20 x - 1/4 x
+ 250 25 125 20
+
+ , COEFF(1, -1) =
+
+ 73 2 36 2 3
+ 7/20 x - --- x y - 1/50 y x - --- y - 1/4 x + 9/50 y x + 9/20,
+ 125 125
+
+ COEFF(2, -1) =
+
+ 12 2 2 3
+ - 3/20 + --- y + 1/4 x - 4/25 y x - 3/50 y x + 7/250 x y + 1/20 x,
+ 125
+
+ COEFF(-1, 0) =
+
+ 11 69 2 2 243 3 851
+ -- x + --- y x - 1/2 x + --- y + 1/25 y x - 3/10 - --- x y, COEFF(0, 0)
+ 10 100 500 500
+
+ 57 2 771 3 11 2 303
+ = - --- y x + --- y - 3/25 y x - -- + 1/2 x - 3/10 x + --- x y,
+ 100 500 10 500
+
+ COEFF(1, 0) =
+
+ 3 729 2 93 2 447
+ 3/25 y x + --- y + 1/2 x - 9/10 - --- y x + --- x y - 7/10 x,
+ 500 100 500
+
+ COEFF(2, 0) =
+
+ 243 2 101 81 2 3
+ - --- y - 1/2 x + 3/10 + --- x y + --- y x - 1/10 x - 1/25 y x ,
+ 500 500 100
+
+ COEFF(-1, 1) =
+
+ 11 203 3 54 2 39 2
+ - -- x + --- x y + 1/50 y x - --- y + 1/4 x + 3/20 - -- y x ,
+ 20 125 125 50
+
+ 11 3 213 21 2 2 93
+ COEFF(0, 1) = -- - 3/50 y x - --- y + -- y x + 3/20 x - 1/4 x - --- x y,
+ 20 125 25 250
+
+ COEFF(1, 1) =
+
+ 141 3 33 2 2 162
+ 9/20 + 7/20 x - --- x y + 3/50 y x + -- y x - 1/4 x - --- y, COEFF(2, 1)
+ 125 50 125
+
+ 54 2 18 2 31 3
+ = - 3/20 + --- y + 1/4 x - -- y x - --- x y - 1/50 y x + 1/20 x,
+ 125 25 250
+
+ 3 21 197 43 2
+ COEFF(-1, 2) = - 3/25 y x + --- y - --- x y + --- y x ,
+ 500 500 100
+
+ 3 159 79 2 437
+ COEFF(0, 2) = 9/25 y x - --- x y - --- y x + --- y,
+ 500 100 500
+
+ 29 2 3 63 409
+ COEFF(1, 2) = --- y x - 9/25 y x + --- y + --- x y,
+ 100 500 500
+
+ 2 53 3 21
+ COEFF(2, 2) = 7/100 y x - --- x y + 3/25 y x - --- y]
+ 500 500
+
+> print_coeffs__lc_of_data(%, "coeffs_dyy->coeff_", "fp",
+> "2d.coeffs/2d.cube.order3.smooth0/coeffs-dyy.compute.c");
+bytes used=100092548, alloc=2227816, time=8.41
+bytes used=101092996, alloc=2227816, time=8.49
+bytes used=102093148, alloc=2227816, time=8.61
+bytes used=103093312, alloc=2227816, time=8.69
+bytes used=104093644, alloc=2227816, time=8.84
+bytes used=105093832, alloc=2227816, time=8.92
+bytes used=106093996, alloc=2227816, time=9.05
+>
+################################################################################
+>
+#
+# 2d, cube, order=4, smoothing=0 (size=5)
+#
+>
+# interpolating polynomial
+> interp_2d_cube_order4_smooth0
+> := Lagrange_polynomial_interpolant(fn_2d_order4, coeffs_list_2d_order4,
+> coords_list_2d, posn_list_2d_size5);
+bytes used=107094420, alloc=2227816, time=9.13
+bytes used=108095396, alloc=2227816, time=9.19
+bytes used=109095660, alloc=2227816, time=9.25
+bytes used=110095928, alloc=2227816, time=9.31
+bytes used=111096132, alloc=2227816, time=9.36
+bytes used=112096424, alloc=2227816, time=9.43
+bytes used=113096732, alloc=2227816, time=9.50
+bytes used=114097080, alloc=2227816, time=9.57
+bytes used=115097268, alloc=2227816, time=9.64
+bytes used=116097436, alloc=2227816, time=9.71
+bytes used=117097712, alloc=2227816, time=9.77
+bytes used=118100480, alloc=2227816, time=9.84
+bytes used=119101300, alloc=2227816, time=9.90
+bytes used=120101536, alloc=2227816, time=9.96
+bytes used=121102272, alloc=2227816, time=10.03
+bytes used=122103488, alloc=2227816, time=10.09
+bytes used=123103664, alloc=2227816, time=10.14
+bytes used=124103840, alloc=2227816, time=10.21
+bytes used=125104372, alloc=2227816, time=10.28
+interp_2d_cube_order4_smooth0 := (- 1/24 DATA(0, 2) - 5/4 DATA(0, 0)
+
+ 2
+ + 2/3 DATA(0, 1) - 1/24 DATA(0, -2) + 2/3 DATA(0, -1)) y + DATA(0, 0) + (
+
+ - 1/576 DATA(2, 2) + 1/144 DATA(1, 2) + 1/144 DATA(-1, 2) - 1/96 DATA(0, 2)
+
+ + 1/36 DATA(2, 1) - 5/96 DATA(2, 0) + 1/36 DATA(2, -1) - 5/16 DATA(0, 0)
+
+ + 5/24 DATA(1, 0) + 1/6 DATA(0, 1) - 1/9 DATA(1, 1) - 1/576 DATA(-2, 2)
+
+ + 1/36 DATA(-2, 1) - 5/96 DATA(-2, 0) + 1/36 DATA(-2, -1)
+
+ - 1/576 DATA(2, -2) + 1/144 DATA(1, -2) - 1/96 DATA(0, -2)
+
+ + 1/144 DATA(-1, -2) - 1/576 DATA(-2, -2) - 1/9 DATA(-1, -1)
+
+ + 1/6 DATA(0, -1) - 1/9 DATA(1, -1) + 5/24 DATA(-1, 0) - 1/9 DATA(-1, 1))
+
+ 4 2
+ x y + (- 1/288 DATA(2, 2) + 1/72 DATA(1, 2) + 1/72 DATA(-1, 2)
+
+ - 1/48 DATA(0, 2) + 1/36 DATA(2, 1) - 1/36 DATA(2, -1) + 1/6 DATA(0, 1)
+
+ - 1/9 DATA(1, 1) - 1/288 DATA(-2, 2) + 1/36 DATA(-2, 1)
+
+ - 1/36 DATA(-2, -1) + 1/288 DATA(2, -2) - 1/72 DATA(1, -2)
+
+ + 1/48 DATA(0, -2) - 1/72 DATA(-1, -2) + 1/288 DATA(-2, -2)
+
+ + 1/9 DATA(-1, -1) - 1/6 DATA(0, -1) + 1/9 DATA(1, -1) - 1/9 DATA(-1, 1))
+
+ 4
+ x y + (1/144 DATA(2, 2) - 1/72 DATA(1, 2) + 1/72 DATA(-1, 2)
+
+ - 1/72 DATA(2, 1) + 1/72 DATA(2, -1) - 1/72 DATA(-2, -1) + 1/36 DATA(1, 1)
+
+ - 1/144 DATA(-2, 2) + 1/72 DATA(-2, 1) + 1/144 DATA(-2, -2)
+
+ - 1/144 DATA(2, -2) + 1/72 DATA(1, -2) - 1/72 DATA(-1, -2)
+
+ 3 3
+ + 1/36 DATA(-1, -1) - 1/36 DATA(1, -1) - 1/36 DATA(-1, 1)) x y + (
+
+ - 1/288 DATA(2, 2) + 1/144 DATA(1, 2) - 1/144 DATA(-1, 2) + 1/18 DATA(2, 1)
+
+ - 5/48 DATA(2, 0) + 1/18 DATA(2, -1) + 5/24 DATA(1, 0) - 1/9 DATA(1, 1)
+
+ + 1/288 DATA(-2, 2) - 1/18 DATA(-2, 1) + 5/48 DATA(-2, 0)
+
+ - 1/18 DATA(-2, -1) - 1/288 DATA(2, -2) + 1/144 DATA(1, -2)
+
+ - 1/144 DATA(-1, -2) + 1/288 DATA(-2, -2) + 1/9 DATA(-1, -1)
+
+ 3 2
+ - 1/9 DATA(1, -1) - 5/24 DATA(-1, 0) + 1/9 DATA(-1, 1)) x y + (
+
+ - 1/144 DATA(2, 2) + 1/72 DATA(1, 2) - 1/72 DATA(-1, 2) + 1/18 DATA(2, 1)
+
+ - 1/18 DATA(2, -1) - 1/9 DATA(1, 1) + 1/144 DATA(-2, 2) - 1/18 DATA(-2, 1)
+
+ + 1/18 DATA(-2, -1) + 1/144 DATA(2, -2) - 1/72 DATA(1, -2)
+
+ + 1/72 DATA(-1, -2) - 1/144 DATA(-2, -2) - 1/9 DATA(-1, -1)
+
+ 3
+ + 1/9 DATA(1, -1) + 1/9 DATA(-1, 1)) x y + (- 1/288 DATA(2, 2)
+
+ + 1/36 DATA(1, 2) - 1/36 DATA(-1, 2) + 1/72 DATA(2, 1) - 1/48 DATA(2, 0)
+
+ + 1/72 DATA(2, -1) + 1/6 DATA(1, 0) - 1/9 DATA(1, 1) + 1/288 DATA(-2, 2)
+
+ - 1/72 DATA(-2, 1) + 1/48 DATA(-2, 0) - 1/72 DATA(-2, -1)
+
+ - 1/288 DATA(2, -2) + 1/36 DATA(1, -2) - 1/36 DATA(-1, -2)
+
+ + 1/288 DATA(-2, -2) + 1/9 DATA(-1, -1) - 1/9 DATA(1, -1)
+
+ 4
+ - 1/6 DATA(-1, 0) + 1/9 DATA(-1, 1)) x y + (- 1/576 DATA(2, 2)
+
+ + 1/36 DATA(1, 2) + 1/36 DATA(-1, 2) - 5/96 DATA(0, 2) + 1/144 DATA(2, 1)
+
+ - 1/96 DATA(2, 0) + 1/144 DATA(2, -1) - 5/16 DATA(0, 0) + 1/6 DATA(1, 0)
+
+ + 5/24 DATA(0, 1) - 1/9 DATA(1, 1) - 1/576 DATA(-2, 2) + 1/144 DATA(-2, 1)
+
+ - 1/96 DATA(-2, 0) + 1/144 DATA(-2, -1) - 1/576 DATA(2, -2)
+
+ + 1/36 DATA(1, -2) - 5/96 DATA(0, -2) + 1/36 DATA(-1, -2)
+
+ - 1/576 DATA(-2, -2) - 1/9 DATA(-1, -1) + 5/24 DATA(0, -1)
+
+ 2 4
+ - 1/9 DATA(1, -1) + 1/6 DATA(-1, 0) - 1/9 DATA(-1, 1)) x y + (
+
+ 1/576 DATA(2, 2) - 1/144 DATA(1, 2) - 1/144 DATA(-1, 2) + 1/96 DATA(0, 2)
+
+ - 1/144 DATA(2, 1) + 1/96 DATA(2, 0) - 1/144 DATA(2, -1) + 1/16 DATA(0, 0)
+
+ - 1/24 DATA(1, 0) - 1/24 DATA(0, 1) + 1/36 DATA(1, 1) + 1/576 DATA(-2, 2)
+
+ - 1/144 DATA(-2, 1) + 1/96 DATA(-2, 0) - 1/144 DATA(-2, -1)
+
+ + 1/576 DATA(2, -2) - 1/144 DATA(1, -2) + 1/96 DATA(0, -2)
+
+ - 1/144 DATA(-1, -2) + 1/576 DATA(-2, -2) + 1/36 DATA(-1, -1)
+
+ - 1/24 DATA(0, -1) + 1/36 DATA(1, -1) - 1/24 DATA(-1, 0)
+
+ 4 4
+ + 1/36 DATA(-1, 1)) x y + (1/288 DATA(2, 2) - 1/144 DATA(1, 2)
+
+ + 1/144 DATA(-1, 2) - 1/72 DATA(2, 1) + 1/48 DATA(2, 0) - 1/72 DATA(2, -1)
+
+ + 1/24 DATA(-1, 0) - 1/24 DATA(1, 0) + 1/36 DATA(1, 1) - 1/288 DATA(-2, 2)
+
+ + 1/72 DATA(-2, 1) - 1/48 DATA(-2, 0) + 1/72 DATA(-2, -1)
+
+ + 1/288 DATA(2, -2) - 1/144 DATA(1, -2) + 1/144 DATA(-1, -2)
+
+ - 1/288 DATA(-2, -2) - 1/36 DATA(-1, -1) + 1/36 DATA(1, -1)
+
+ 3 4
+ - 1/36 DATA(-1, 1)) x y + (1/144 DATA(2, 2) - 1/18 DATA(1, 2)
+
+ + 1/18 DATA(-1, 2) - 1/18 DATA(2, 1) + 1/18 DATA(2, -1) + 4/9 DATA(1, 1)
+
+ - 1/144 DATA(-2, 2) + 1/18 DATA(-2, 1) - 1/18 DATA(-2, -1)
+
+ - 1/144 DATA(2, -2) + 1/18 DATA(1, -2) - 1/18 DATA(-1, -2)
+
+ + 1/144 DATA(-2, -2) + 4/9 DATA(-1, -1) - 4/9 DATA(1, -1)
+
+ - 4/9 DATA(-1, 1)) x y + (1/288 DATA(2, 2) - 1/36 DATA(1, 2)
+
+ + 1/36 DATA(-1, 2) - 1/18 DATA(2, 1) + 5/48 DATA(2, 0) - 1/18 DATA(2, -1)
+
+ - 5/6 DATA(1, 0) + 4/9 DATA(1, 1) - 1/288 DATA(-2, 2) + 1/18 DATA(-2, 1)
+
+ - 5/48 DATA(-2, 0) + 1/18 DATA(-2, -1) + 1/288 DATA(2, -2)
+
+ - 1/36 DATA(1, -2) + 1/36 DATA(-1, -2) - 1/288 DATA(-2, -2)
+
+ - 4/9 DATA(-1, -1) + 4/9 DATA(1, -1) + 5/6 DATA(-1, 0) - 4/9 DATA(-1, 1))
+
+ 2 /
+ x y + |1/576 DATA(2, 2) - 1/36 DATA(1, 2) - 1/36 DATA(-1, 2)
+ \
+
+ + 5/96 DATA(0, 2) - 1/36 DATA(2, 1) + 5/96 DATA(2, 0) - 1/36 DATA(2, -1)
+
+ 25
+ + -- DATA(0, 0) - 5/6 DATA(1, 0) - 5/6 DATA(0, 1) + 4/9 DATA(1, 1)
+ 16
+
+ + 1/576 DATA(-2, 2) - 1/36 DATA(-2, 1) + 5/96 DATA(-2, 0)
+
+ - 1/36 DATA(-2, -1) + 1/576 DATA(2, -2) - 1/36 DATA(1, -2)
+
+ + 5/96 DATA(0, -2) - 1/36 DATA(-1, -2) + 1/576 DATA(-2, -2)
+
+ + 4/9 DATA(-1, -1) - 5/6 DATA(0, -1) + 4/9 DATA(1, -1) - 5/6 DATA(-1, 0)
+
+ \ 2 2
+ + 4/9 DATA(-1, 1)| x y + (1/288 DATA(2, 2) - 1/18 DATA(1, 2)
+ /
+
+ - 1/18 DATA(-1, 2) + 5/48 DATA(0, 2) - 1/36 DATA(2, 1) + 1/36 DATA(2, -1)
+
+ - 5/6 DATA(0, 1) + 4/9 DATA(1, 1) + 1/288 DATA(-2, 2) - 1/36 DATA(-2, 1)
+
+ + 1/36 DATA(-2, -1) - 1/288 DATA(2, -2) + 1/18 DATA(1, -2)
+
+ - 5/48 DATA(0, -2) + 1/18 DATA(-1, -2) - 1/288 DATA(-2, -2)
+
+ - 4/9 DATA(-1, -1) + 5/6 DATA(0, -1) - 4/9 DATA(1, -1) + 4/9 DATA(-1, 1))
+
+ 2
+ x y + (1/288 DATA(2, 2) - 1/72 DATA(1, 2) - 1/72 DATA(-1, 2)
+
+ + 1/48 DATA(0, 2) - 1/144 DATA(2, 1) + 1/144 DATA(2, -1)
+
+ - 1/36 DATA(1, -1) - 1/24 DATA(0, 1) + 1/36 DATA(1, 1) + 1/288 DATA(-2, 2)
+
+ - 1/144 DATA(-2, 1) + 1/144 DATA(-2, -1) - 1/288 DATA(2, -2)
+
+ + 1/72 DATA(1, -2) - 1/48 DATA(0, -2) + 1/72 DATA(-1, -2)
+
+ - 1/288 DATA(-2, -2) - 1/36 DATA(-1, -1) + 1/24 DATA(0, -1)
+
+ 4 3
+ + 1/36 DATA(-1, 1)) x y + (1/24 DATA(0, 2) + 1/4 DATA(0, 0)
+
+ 4
+ - 1/6 DATA(0, 1) + 1/24 DATA(0, -2) - 1/6 DATA(0, -1)) y + (
+
+ 1/24 DATA(2, 0) + 1/4 DATA(0, 0) - 1/6 DATA(1, 0) + 1/24 DATA(-2, 0)
+
+ 4
+ - 1/6 DATA(-1, 0)) x +
+
+ (- 1/12 DATA(2, 0) + 2/3 DATA(1, 0) + 1/12 DATA(-2, 0) - 2/3 DATA(-1, 0)) x
+
+ + (- 1/24 DATA(2, 0) - 5/4 DATA(0, 0) + 2/3 DATA(1, 0) - 1/24 DATA(-2, 0)
+
+ 2
+ + 2/3 DATA(-1, 0)) x +
+
+ 3
+ (1/12 DATA(0, 2) - 1/6 DATA(0, 1) - 1/12 DATA(0, -2) + 1/6 DATA(0, -1)) y
+
+ +
+
+ (- 1/12 DATA(0, 2) + 2/3 DATA(0, 1) + 1/12 DATA(0, -2) - 2/3 DATA(0, -1)) y
+
+ + (- 1/144 DATA(2, 2) + 1/18 DATA(1, 2) - 1/18 DATA(-1, 2)
+
+ + 1/72 DATA(2, 1) - 1/72 DATA(2, -1) - 1/9 DATA(1, 1) + 1/144 DATA(-2, 2)
+
+ - 1/72 DATA(-2, 1) + 1/72 DATA(-2, -1) + 1/144 DATA(2, -2)
+
+ - 1/18 DATA(1, -2) + 1/18 DATA(-1, -2) - 1/144 DATA(-2, -2)
+
+ 3
+ - 1/9 DATA(-1, -1) + 1/9 DATA(1, -1) + 1/9 DATA(-1, 1)) x y + (
+
+ - 1/288 DATA(2, 2) + 1/18 DATA(1, 2) + 1/18 DATA(-1, 2) - 5/48 DATA(0, 2)
+
+ + 1/144 DATA(2, 1) - 1/144 DATA(2, -1) + 5/24 DATA(0, 1) - 1/9 DATA(1, 1)
+
+ - 1/288 DATA(-2, 2) + 1/144 DATA(-2, 1) - 1/144 DATA(-2, -1)
+
+ + 1/288 DATA(2, -2) - 1/18 DATA(1, -2) + 5/48 DATA(0, -2)
+
+ - 1/18 DATA(-1, -2) + 1/288 DATA(-2, -2) + 1/9 DATA(-1, -1)
+
+ 2 3
+ - 5/24 DATA(0, -1) + 1/9 DATA(1, -1) - 1/9 DATA(-1, 1)) x y +
+
+ 3
+ (1/12 DATA(2, 0) - 1/6 DATA(1, 0) - 1/12 DATA(-2, 0) + 1/6 DATA(-1, 0)) x
+
+>
+# I
+> coeffs_as_lc_of_data(%, posn_list_2d_size5);
+bytes used=126126424, alloc=2227816, time=10.34
+bytes used=127129732, alloc=2227816, time=10.40
+ 4 2 3 3 2
+[COEFF(-2, -2) = 1/288 x y + 1/288 x y - 1/144 x y - 1/288 y x
+
+ 2 4 4 3 4 2 2 3
+ - 1/576 x y - 1/288 x y + 1/288 x y + 1/576 x y - 1/144 y x
+
+ 2 3 2 3 3 3 4
+ - 1/288 x y + 1/288 x y + 1/144 x y + 1/144 x y - 1/288 x y
+
+ 4 2 4 4 2 2 4 3
+ - 1/576 x y + 1/576 x y , COEFF(-1, -2) = - 1/36 x y + 1/72 x y
+
+ 4 2 4 3 2 2 4
+ - 1/72 x y + 1/18 y x - 1/36 x y - 1/144 x y + 1/36 x y
+
+ 4 2 4 4 3 3 4 2 3
+ + 1/144 x y - 1/144 x y + 1/18 x y + 1/144 x y - 1/18 x y
+
+ 3 3 2 3 3
+ - 1/18 x y - 1/72 x y + 1/36 x y + 1/72 y x , COEFF(0, -2) = - 1/12 y
+
+ 4 4 4 2 2 3 2
+ + 1/24 y + 1/48 x y - 1/96 x y + 5/48 x y + 1/12 y - 5/48 y x
+
+ 2 4 4 3 4 4 2 2 2
+ - 5/96 x y - 1/48 x y + 1/96 x y + 5/96 x y - 1/24 y ,
+
+ 4 3 3 2 2 4
+ COEFF(1, -2) = 1/18 x y + 1/72 x y + 1/144 x y + 1/18 y x + 1/36 x y
+
+ 4 2 3 4 3 3 4 4
+ + 1/144 x y - 1/72 y x - 1/72 x y + 1/72 x y - 1/144 x y
+
+ 3 2 3 2 2 4 3 4
+ - 1/18 x y - 1/18 x y - 1/36 x y + 1/36 x y - 1/144 x y
+
+ 2 2 2 4 2 2 3
+ - 1/36 x y , COEFF(2, -2) = - 1/576 x y - 1/288 y x + 1/288 x y
+
+ 4 4 3 3 4 4 2
+ + 1/576 x y + 1/144 y x + 1/288 x y - 1/144 x y - 1/576 x y
+
+ 4 3 2 3 2 3 4
+ - 1/288 x y + 1/288 x y - 1/288 x y + 1/144 x y - 1/288 x y
+
+ 3 3 2 2 4 4
+ - 1/144 x y + 1/576 x y + 1/288 x y, COEFF(-2, -1) = - 1/36 x y
+
+ 2 2 3 2 2 3 3 3
+ + 1/36 y x - 1/144 x y - 1/36 x y + 1/18 y x - 1/72 x y
+
+ 2 4 3 4 2 4 3
+ + 1/144 x y + 1/72 x y - 1/18 x y + 1/36 x y + 1/144 x y
+
+ 2 3 2 4 4 4 3 4
+ + 1/18 x y - 1/18 x y - 1/144 x y - 1/72 x y + 1/72 x y ,
+
+ 2 4 3 3 3 4
+ COEFF(-1, -1) = - 1/9 x y + 4/9 x y - 1/9 x y + 1/36 x y + 1/9 x y
+
+ 2 2 4 2 3 2 2 2 4 4
+ + 4/9 x y - 1/9 x y + 1/9 x y - 4/9 x y - 4/9 y x + 1/36 x y
+
+ 4 3 4 3 4 3 2 3
+ + 1/9 x y - 1/36 x y - 1/9 y x - 1/36 x y + 1/9 x y , COEFF(0, -1)
+
+ 4 4 4 2 4 3 2 2
+ = - 1/24 x y + 1/6 x y - 1/6 y + 1/6 y + 5/6 y x - 2/3 y + 2/3 y
+
+ 2 3 2 4 4 4 3 2 2
+ - 5/24 x y + 5/24 x y - 1/6 x y + 1/24 x y - 5/6 x y ,
+
+ 3 3 2 4 2 2 4 2 4
+ COEFF(1, -1) = - 1/36 x y - 1/9 x y + 4/9 x y - 1/9 x y + 1/9 x y
+
+ 2 3 3 2 2 3 4 3
+ - 4/9 x y + 1/9 x y - 1/9 x y - 4/9 y x + 1/9 x y - 1/36 x y
+
+ 2 4 4 3 4 4 3
+ + 4/9 x y + 1/36 x y + 1/36 x y - 1/9 x y + 1/9 y x , COEFF(2, -1)
+
+ 4 4 4 4 2 4 2 2
+ = 1/18 x y - 1/144 x y - 1/36 x y + 1/36 x y + 1/72 x y - 1/36 x y
+
+ 3 3 3 4 3 3 4 2 4
+ + 1/72 x y - 1/18 y x + 1/144 x y - 1/72 x y + 1/144 x y
+
+ 2 2 3 2 3 3 2
+ - 1/18 x y + 1/36 y x - 1/72 x y - 1/144 x y + 1/18 x y ,
+
+ 4 2 3 3 4 2 2 4
+ COEFF(-2, 0) = - 5/96 x y - 1/12 x - 1/48 x y + 5/96 x y + 1/24 x
+
+ 4 2 4 4 4 2 2 3 2
+ + 1/48 x y - 1/96 x y + 1/96 x y - 5/48 x y - 1/24 x + 5/48 x y
+
+ 4 4 4 2 4 2
+ + 1/12 x, COEFF(-1, 0) = - 1/24 x y - 1/6 x y + 5/6 x y + 5/24 x y
+
+ 3 4 3 2 2 3 4 2 2
+ + 1/24 x y - 5/24 x y + 2/3 x + 1/6 x - 1/6 x - 2/3 x - 5/6 x y
+
+ 2 4 4 2 4 2 4 25 2 2
+ + 1/6 x y , COEFF(0, 0) = - 5/16 x y + 1/4 x - 5/16 x y + -- x y
+ 16
+
+ 4 4 4 2 2 2 2
+ + 1/16 x y + 1/4 y + 1 - 5/4 y - 5/4 x , COEFF(1, 0) = - 5/6 x y
+
+ 2 4 2 4 4 4 4 3 4
+ + 1/6 x y + 2/3 x - 1/24 x y + 1/6 x y - 1/6 x - 1/24 x y + 2/3 x
+
+ 3 2 2 3 4 2 4
+ + 5/24 x y - 5/6 x y - 1/6 x + 5/24 x y , COEFF(2, 0) = - 1/48 x y
+
+ 4 2 4 4 2 4 4 2
+ + 1/24 x + 5/48 x y - 1/12 x + 1/96 x y - 1/96 x y - 5/96 x y
+
+ 3 2 3 4 3 2 2 2
+ + 1/12 x - 1/24 x + 1/48 x y - 5/48 x y + 5/96 x y , COEFF(-2, 1)
+
+ 3 4 2 3 2 3 2
+ = - 1/72 x y + 1/36 x y + 1/144 x y - 1/36 y x - 1/18 x y
+
+ 2 4 4 3 3 3 3 4
+ + 1/18 x y + 1/144 x y - 1/144 x y + 1/72 x y + 1/72 x y
+
+ 2 3 2 2 4 4 4 2
+ + 1/18 x y - 1/18 y x - 1/36 x y - 1/144 x y + 1/36 x y
+
+ 4 3 3 3 3 4 2
+ - 1/72 x y , COEFF(-1, 1) = 1/9 x y - 1/36 x y + 1/9 y x - 1/9 x y
+
+ 3 4 4 4 3 4 4 2 4 2
+ - 1/36 x y - 1/9 x y + 1/36 x y + 1/36 x y - 1/9 x y - 4/9 x y
+
+ 2 2 2 2 3 3 2 4
+ + 4/9 y x + 4/9 x y - 1/9 x y + 1/9 x y - 4/9 x y + 1/9 x y ,
+
+ 4 2 2 3 2 4 4 4
+ COEFF(0, 1) = 1/6 x y + 5/24 x y + 2/3 y + 2/3 y - 1/24 x y - 1/6 y
+
+ 4 4 3 2 2 2 2 4 3
+ + 1/6 x y - 1/24 x y - 5/6 x y - 5/6 y x + 5/24 x y - 1/6 y ,
+
+ 2 4 3 3 4 3
+ COEFF(1, 1) = 4/9 x y + 1/36 x y - 1/9 x y - 1/9 x y - 1/9 y x
+
+ 3 2 3 3 2 2 2 4 4 4
+ - 1/9 x y + 1/36 x y + 4/9 x y - 1/9 x y + 1/36 x y + 4/9 x y
+
+ 2 3 4 2 4 2 3 4
+ - 1/9 x y - 1/9 x y - 1/9 x y + 4/9 y x + 1/36 x y , COEFF(2, 1) =
+
+ 4 2 3 4 3 2 2 3
+ 1/36 x y - 1/18 x y + 1/18 y x + 1/36 x y + 1/18 x y + 1/144 x y
+
+ 2 4 3 2 4 4 2 4
+ - 1/18 x y - 1/144 x y - 1/36 y x - 1/144 x y + 1/144 x y
+
+ 3 4 3 2 2 3 3 4
+ - 1/72 x y + 1/72 x y - 1/36 x y - 1/72 x y + 1/72 x y ,
+
+ 4 2 4 4 2 4
+ COEFF(-2, 2) = - 1/288 x y + 1/288 y x + 1/576 x y - 1/576 x y
+
+ 3 3 4 4 3 2 2
+ + 1/144 x y - 1/288 x y - 1/144 x y + 1/288 x y + 1/576 x y
+
+ 2 3 2 4 2 4 3 3
+ - 1/288 x y - 1/288 x y - 1/576 x y + 1/288 x y - 1/144 x y
+
+ 3 2 3 4 3 4 2
+ + 1/288 x y + 1/144 y x , COEFF(-1, 2) = - 1/72 x y + 1/144 x y
+
+ 4 4 4 3 3 3 2 4
+ - 1/144 x y + 1/72 x y - 1/72 y x + 1/72 x y + 1/36 x y
+
+ 2 2 2 3 2 3 2 2
+ - 1/36 x y + 1/18 x y + 1/18 x y - 1/18 y x - 1/144 x y + 1/36 x y
+
+ 3 4 3 4 4 2
+ - 1/18 x y - 1/36 x y + 1/144 x y , COEFF(0, 2) = - 1/96 x y
+
+ 2 4 3 2 4 4 2
+ - 1/24 y + 1/48 x y - 5/96 x y + 1/24 y + 5/48 y x - 1/12 y
+
+ 4 4 2 2 3 4 2 3
+ + 1/96 x y + 5/96 x y + 1/12 y - 1/48 x y - 5/48 x y , COEFF(1, 2)
+
+ 4 3 4 4 2 3 4
+ = - 1/72 x y - 1/144 x y - 1/36 x y - 1/144 x y - 1/18 x y
+
+ 3 2 3 2 4 3 3
+ + 1/18 x y - 1/18 y x + 1/144 x y + 1/36 x y - 1/72 x y
+
+ 2 4 2 3 4 2 2 2 4
+ + 1/36 x y + 1/18 x y + 1/144 x y - 1/36 x y + 1/72 x y
+
+ 3 4 3 4 2 4 4
+ + 1/72 y x , COEFF(2, 2) = 1/288 x y - 1/576 x y + 1/576 x y
+
+ 4 2 3 4 3
+ - 1/288 x y + 1/288 x y + 1/288 x y + 1/144 x y - 1/144 x y
+
+ 2 3 2 4 3 3 2 4
+ + 1/288 y x - 1/288 x y - 1/288 x y + 1/144 x y - 1/576 x y
+
+ 2 3 2 2 3
+ - 1/288 x y + 1/576 x y - 1/144 y x ]
+
+> print_coeffs__lc_of_data(%, "coeffs_I->coeff_", "fp",
+> "2d.coeffs/2d.cube.order4.smooth0/coeffs-I.compute.c");
+bytes used=128130292, alloc=2227816, time=10.47
+bytes used=129130448, alloc=2227816, time=10.54
+bytes used=130130628, alloc=2227816, time=10.63
+bytes used=131157976, alloc=2227816, time=10.72
+bytes used=132170256, alloc=2227816, time=10.79
+bytes used=133182936, alloc=2227816, time=10.85
+bytes used=134184444, alloc=2227816, time=10.93
+bytes used=135184740, alloc=2227816, time=11.04
+bytes used=136185208, alloc=2227816, time=11.13
+bytes used=137185504, alloc=2227816, time=11.19
+bytes used=138185676, alloc=2227816, time=11.39
+bytes used=139186008, alloc=2227816, time=11.46
+bytes used=140186252, alloc=2227816, time=11.53
+bytes used=141186616, alloc=2227816, time=11.59
+bytes used=142186928, alloc=2227816, time=11.65
+bytes used=143187140, alloc=2227816, time=11.71
+bytes used=144187292, alloc=2227816, time=11.79
+bytes used=145187476, alloc=2424388, time=11.88
+bytes used=146187724, alloc=2424388, time=11.96
+bytes used=147188072, alloc=2424388, time=12.05
+bytes used=148188276, alloc=2424388, time=12.14
+bytes used=149188548, alloc=2424388, time=12.24
+bytes used=150189040, alloc=2424388, time=12.35
+bytes used=151189584, alloc=2424388, time=12.44
+bytes used=152189776, alloc=2424388, time=12.71
+bytes used=153190128, alloc=2424388, time=12.86
+bytes used=154190356, alloc=2424388, time=12.92
+bytes used=155198184, alloc=2424388, time=13.02
+bytes used=156199352, alloc=2424388, time=13.15
+bytes used=157206092, alloc=2424388, time=13.34
+bytes used=158206320, alloc=2424388, time=13.51
+bytes used=159206528, alloc=2424388, time=13.63
+bytes used=160206828, alloc=2424388, time=13.70
+bytes used=161207036, alloc=2424388, time=13.81
+bytes used=162207248, alloc=2424388, time=13.91
+bytes used=163207460, alloc=2424388, time=14.15
+bytes used=164207736, alloc=2424388, time=14.23
+bytes used=165207896, alloc=2424388, time=14.31
+bytes used=166208088, alloc=2424388, time=14.42
+bytes used=167208332, alloc=2424388, time=14.63
+bytes used=168208740, alloc=2424388, time=14.73
+bytes used=169208984, alloc=2424388, time=14.80
+bytes used=170209144, alloc=2424388, time=14.91
+bytes used=171209480, alloc=2424388, time=15.13
+bytes used=172209780, alloc=2424388, time=15.24
+>
+# d/dx
+> simplify( diff(interp_2d_cube_order4_smooth0,x) );
+bytes used=173210092, alloc=2424388, time=15.39
+bytes used=174210336, alloc=2424388, time=15.44
+bytes used=175210520, alloc=2424388, time=15.51
+bytes used=176210708, alloc=2424388, time=15.57
+bytes used=177210968, alloc=2489912, time=15.65
+bytes used=178211200, alloc=2620960, time=15.71
+- 1/12 DATA(2, 0) + 2/3 DATA(1, 0) + 1/12 DATA(-2, 0) - 2/3 DATA(-1, 0)
+
+ 3 3 2
+ - 1/18 y DATA(-1, 2) - 1/72 y DATA(2, -1) + 8/9 x y DATA(-1, -1)
+
+ 2 2 2 2 2 2
+ + 5/8 x y DATA(1, 0) - 1/3 x y DATA(1, 1) + 1/96 x y DATA(-2, 2)
+
+ 3 3 3
+ - 1/9 y DATA(1, 1) + 1/144 y DATA(-2, 2) - 1/72 y DATA(-2, 1)
+
+ 3 3
+ + 1/72 y DATA(2, 1) - 2/3 x DATA(-1, 0) - 1/12 x DATA(2, 0)
+
+ - 5/2 x DATA(0, 0) + 4/3 x DATA(1, 0) - 1/12 x DATA(-2, 0)
+
+ 3 3
+ + 4/3 x DATA(-1, 0) - 1/144 y DATA(2, 2) + 1/18 y DATA(1, 2)
+
+ 3 3 3
+ + 1/72 y DATA(-2, -1) + 1/144 y DATA(2, -2) - 1/18 y DATA(1, -2)
+
+ 2 2 2 2
+ - 1/96 x y DATA(2, -2) + 1/48 x y DATA(1, -2)
+
+ 2 2 2 2
+ - 1/48 x y DATA(-1, -2) + 1/96 x y DATA(-2, -2)
+
+ 2 2 2 2 2 2
+ + 1/3 x y DATA(-1, -1) - 1/3 x y DATA(1, -1) - 5/8 x y DATA(-1, 0)
+
+ 2 2 2 2
+ + 1/3 x y DATA(-1, 1) + 1/24 y x DATA(1, 2) - 1/24 y x DATA(-1, 2)
+
+ 2 2 2 2 2
+ + 1/6 y x DATA(2, 1) + 5/16 x y DATA(-2, 0) - 1/6 x y DATA(-2, -1)
+
+ 2 2 2
+ - 1/24 y x DATA(1, -2) + 1/24 y x DATA(-1, -2) - 1/48 y x DATA(-2, -2)
+
+ 2 2 2
+ - 1/48 y x DATA(2, 2) - 1/3 y x DATA(1, 1) + 1/48 y x DATA(-2, 2)
+
+ 2 2 2
+ - 1/6 y x DATA(-2, 1) + 1/6 y x DATA(-2, -1) + 1/48 y x DATA(2, -2)
+
+ 4 4 4
+ - 1/9 y DATA(1, -1) - 1/288 y DATA(2, 2) + 1/36 y DATA(1, 2)
+
+ 4 4 4
+ - 1/36 y DATA(-1, 2) + 1/72 y DATA(2, 1) - 1/288 x y DATA(-2, 2)
+
+ 4 4 4
+ - 2/9 x y DATA(-1, -1) + 5/12 x y DATA(0, -1) - 2/9 x y DATA(1, -1)
+
+ 4 4 4
+ + 1/3 x y DATA(-1, 0) - 2/9 x y DATA(-1, 1) + 1/72 x y DATA(-2, -1)
+
+ 4 4 4
+ - 1/288 x y DATA(2, -2) + 1/18 x y DATA(1, -2) - 1/288 x y DATA(-2, -2)
+
+ 2 2 2
+ - 1/3 y x DATA(-1, -1) + 1/3 y x DATA(1, -1) + 1/3 y x DATA(-1, 1)
+
+ 2 4 4
+ - 1/6 y x DATA(2, -1) + 1/18 x y DATA(1, 2) + 1/72 x y DATA(2, -1)
+
+ 4 4 4
+ - 5/8 x y DATA(0, 0) + 1/3 x y DATA(1, 0) + 5/12 x y DATA(0, 1)
+
+ 4 3 4 4
+ - 1/288 x y DATA(2, 2) + 1/144 x y DATA(-2, -2) - 5/48 x y DATA(0, -2)
+
+ 4 4 4
+ + 1/18 x y DATA(-1, -2) - 2/9 x y DATA(1, 1) + 1/72 x y DATA(-2, 1)
+
+ 4 4 4
+ - 1/48 x y DATA(-2, 0) - 1/6 y DATA(-1, 0) + 1/18 x y DATA(-1, 2)
+
+ 4 4 4
+ - 5/48 x y DATA(0, 2) + 1/72 x y DATA(2, 1) - 1/48 x y DATA(2, 0)
+
+ 4 3 4 3 4
+ + 1/9 y DATA(-1, 1) - 1/36 x y DATA(1, -2) - 1/36 x y DATA(-1, -2)
+
+ 3 4 3 4 3 4
+ + 1/9 x y DATA(1, 1) - 1/36 x y DATA(-2, 1) - 1/36 x y DATA(-2, -1)
+
+ 3 4 3 4 3 4
+ + 1/9 x y DATA(-1, -1) - 1/6 x y DATA(0, -1) + 1/9 x y DATA(1, -1)
+
+ 3 4 3 4 3 4
+ - 1/6 x y DATA(-1, 0) + 1/24 x y DATA(0, -2) + 1/24 x y DATA(0, 2)
+
+ 3 4 3 4 3 4
+ - 1/36 x y DATA(2, 1) + 1/24 x y DATA(2, 0) - 1/36 x y DATA(2, -1)
+
+ 3 4 3 4 3 4
+ + 1/4 x y DATA(0, 0) - 1/6 x y DATA(1, 0) + 1/9 x y DATA(-1, 1)
+
+ 3 4 2 4
+ + 1/144 x y DATA(2, -2) + 1/24 x y DATA(-2, -1)
+
+ 2 4 3 4 3 4
+ + 1/96 x y DATA(2, 2) - 1/6 x y DATA(0, 1) + 1/144 x y DATA(2, 2)
+
+ 2 4 2 4 2 4
+ - 1/48 x y DATA(1, 2) + 1/48 x y DATA(-1, 2) - 1/24 x y DATA(2, 1)
+
+ 2 4 3 4 3 4
+ + 1/16 x y DATA(2, 0) + 1/24 x y DATA(-2, 0) + 1/144 x y DATA(-2, 2)
+
+ 3 4 3 4 2 4
+ - 1/36 x y DATA(1, 2) - 1/36 x y DATA(-1, 2) + 1/96 x y DATA(2, -2)
+
+ 2 4 2 4 2 4
+ - 1/24 x y DATA(2, -1) + 1/8 x y DATA(-1, 0) - 1/8 x y DATA(1, 0)
+
+ 2 4 2 4 2 4
+ + 1/12 x y DATA(1, 1) - 1/96 x y DATA(-2, 2) + 1/24 x y DATA(-2, 1)
+
+ 2 4 2 4
+ - 1/16 x y DATA(-2, 0) + 1/48 x y DATA(-1, -2)
+
+ 2 4 2 4
+ - 1/96 x y DATA(-2, -2) - 1/12 x y DATA(-1, -1)
+
+ 2 4 2 4 2
+ + 1/12 x y DATA(1, -1) - 1/12 x y DATA(-1, 1) + 8/9 x y DATA(1, -1)
+
+ 2 2 2
+ - 5/3 x y DATA(-1, 0) + 8/9 x y DATA(-1, 1) - 1/18 x y DATA(-2, -1)
+
+ 2 2 2
+ + 1/288 x y DATA(2, -2) - 1/18 x y DATA(1, -2) + 5/48 x y DATA(0, -2)
+
+ 2
+ - 1/18 x y DATA(-1, -2) - 1/18 y DATA(2, 1) + 1/18 y DATA(2, -1)
+
+ + 4/9 y DATA(1, 1) - 1/144 y DATA(-2, 2) + 1/144 y DATA(2, 2)
+
+ 4 4
+ - 1/18 y DATA(1, 2) - 1/48 y DATA(2, 0) + 1/72 y DATA(2, -1)
+
+ 4 4 4
+ + 1/6 y DATA(1, 0) - 1/9 y DATA(1, 1) + 1/288 y DATA(-2, 2)
+
+ 4 4 4
+ - 1/72 y DATA(-2, 1) + 1/48 y DATA(-2, 0) - 1/72 y DATA(-2, -1)
+
+ 4 4 4
+ - 1/288 y DATA(2, -2) + 1/36 y DATA(1, -2) - 1/36 y DATA(-1, -2)
+
+ 4 4 2
+ + 1/288 y DATA(-2, -2) + 1/9 y DATA(-1, -1) - 5/3 x y DATA(0, -1)
+
+ 2
+ - 5/6 y DATA(1, 0) + 1/18 y DATA(-2, 1) - 1/18 y DATA(-2, -1)
+
+ - 1/144 y DATA(2, -2) + 1/18 y DATA(1, -2) - 1/18 y DATA(-1, -2)
+
+ + 1/144 y DATA(-2, -2) + 4/9 y DATA(-1, -1) - 4/9 y DATA(1, -1)
+
+ 2 2
+ - 4/9 y DATA(-1, 1) + 1/288 y DATA(2, 2) - 1/36 y DATA(1, 2)
+
+ 2 2
+ + 1/18 y DATA(-1, 2) + 5/6 y DATA(-1, 0) + 1/36 y DATA(-1, 2)
+
+ 2 2 2
+ - 1/18 y DATA(2, 1) + 5/48 y DATA(2, 0) - 1/18 y DATA(2, -1)
+
+ 2 2 2
+ - 4/9 y DATA(-1, 1) + 4/9 y DATA(1, 1) - 1/288 y DATA(-2, 2)
+
+ 2 2 2
+ + 1/18 y DATA(-2, 1) - 5/48 y DATA(-2, 0) + 1/18 y DATA(-2, -1)
+
+ 2 2 2
+ + 1/288 y DATA(2, -2) - 1/36 y DATA(1, -2) + 1/36 y DATA(-1, -2)
+
+ 2 2 2
+ - 1/288 y DATA(-2, -2) - 4/9 y DATA(-1, -1) + 4/9 y DATA(1, -1)
+
+ 2 4 2 2
+ - 1/48 x y DATA(1, -2) - 1/18 x y DATA(1, 2) - 1/18 x y DATA(-1, 2)
+
+ 2 2 2
+ + 5/48 x y DATA(0, 2) - 1/18 x y DATA(2, 1) + 5/48 x y DATA(2, 0)
+
+ 2
+ + 1/288 x y DATA(-2, -2) - 1/9 x y DATA(1, 2) - 1/9 x y DATA(-1, 2)
+
+ + 5/24 x y DATA(0, 2) - 1/18 x y DATA(2, 1) + 1/18 x y DATA(2, -1)
+
+ - 5/3 x y DATA(0, 1) + 8/9 x y DATA(1, 1) + 1/144 x y DATA(-2, 2)
+
+ - 1/18 x y DATA(-2, 1) + 1/18 x y DATA(-2, -1) - 1/144 x y DATA(2, -2)
+
+ 2 2 2
+ + 8/9 x y DATA(1, 1) - 1/18 x y DATA(-2, 1) + 5/48 x y DATA(-2, 0)
+
+ 2 2 2
+ + 1/288 x y DATA(-2, 2) - 1/18 x y DATA(2, -1) + 25/8 x y DATA(0, 0)
+
+ 2 2 2
+ - 5/3 x y DATA(1, 0) - 5/3 x y DATA(0, 1) + 1/288 x y DATA(2, 2)
+
+ 3 3 3 3
+ + 8/9 x y DATA(-1, 1) + 1/72 x y DATA(2, 2) - 1/18 x y DATA(1, 2)
+
+ 3 3 3 3 3 3
+ - 1/18 x y DATA(-1, 2) + 1/12 x y DATA(0, 2) - 1/36 x y DATA(2, 1)
+
+ 3 3 3 3
+ + 1/36 x y DATA(2, -1) - 1/9 x y DATA(1, -1) + 1/144 x y DATA(2, 2)
+
+ 3 3
+ - 1/72 x y DATA(2, -2) + 1/9 x y DATA(1, -2) - 5/24 x y DATA(0, -2)
+
+ + 1/9 x y DATA(-1, -2) - 1/144 x y DATA(-2, -2) - 8/9 x y DATA(-1, -1)
+
+ 3 3
+ + 5/3 x y DATA(0, -1) - 8/9 x y DATA(1, -1) + 1/18 x y DATA(-1, -2)
+
+ 3 3 3 3 3 3
+ - 1/72 x y DATA(-2, -2) - 1/9 x y DATA(-1, -1) + 1/6 x y DATA(0, -1)
+
+ 3 3 3 3 3
+ + 1/9 x y DATA(-1, 1) - 1/144 x y DATA(2, 2) - 1/6 x y DATA(0, 1)
+
+ 3 3 3 3 3 3
+ + 1/9 x y DATA(1, 1) + 1/72 x y DATA(-2, 2) - 1/36 x y DATA(-2, 1)
+
+ 3 3 3 3
+ + 1/36 x y DATA(-2, -1) + 1/18 y DATA(-1, -2) - 1/144 y DATA(-2, -2)
+
+ 3 3 3
+ - 1/9 y DATA(-1, -1) + 1/9 y DATA(1, -1) + 1/9 y DATA(-1, 1)
+
+ 3 3 3
+ + 1/6 x DATA(2, 0) + x DATA(0, 0) - 2/3 x DATA(1, 0)
+
+ 3 3 3
+ + 1/6 x DATA(-2, 0) - 1/72 x y DATA(2, -1) + 5/12 x y DATA(0, 1)
+
+ 3 3 3
+ - 2/9 x y DATA(1, 1) - 1/144 x y DATA(-2, 2) + 1/72 x y DATA(-2, 1)
+
+ 3 3 3 3 3
+ + 1/18 x y DATA(1, -2) - 1/12 x y DATA(0, -2) - 2/9 x y DATA(-1, 1)
+
+ 3 3 3
+ + 1/9 x y DATA(1, 2) + 1/9 x y DATA(-1, 2) - 5/24 x y DATA(0, 2)
+
+ 3 3 2 3
+ + 1/72 x y DATA(2, 1) - 4/9 x y DATA(1, -1) - 1/72 x y DATA(-2, -1)
+
+ 3 3 3
+ + 1/144 x y DATA(2, -2) - 1/9 x y DATA(1, -2) + 5/24 x y DATA(0, -2)
+
+ 3 3 3
+ - 1/9 x y DATA(-1, -2) + 1/144 x y DATA(-2, -2) + 2/9 x y DATA(-1, -1)
+
+ 3 3 3 2
+ - 5/12 x y DATA(0, -1) + 2/9 x y DATA(1, -1) + 5/6 x y DATA(1, 0)
+
+ 3 2 3 2 3
+ + 2/3 x y DATA(0, 1) - 1/144 x y DATA(2, 2) - 1/72 y x DATA(2, 2)
+
+ 3 2 3 2 3 2
+ + 5/6 x y DATA(-1, 0) - 4/9 x y DATA(-1, 1) + 1/9 x y DATA(-2, -1)
+
+ 3 2 3 2
+ - 1/144 x y DATA(2, -2) + 1/36 x y DATA(1, -2)
+
+ 3 2 3 2
+ - 1/24 x y DATA(0, -2) + 1/36 x y DATA(-1, -2)
+
+ 3 2 3 2
+ - 1/144 x y DATA(-2, -2) - 4/9 x y DATA(-1, -1)
+
+ 3 2 2 3 2
+ + 2/3 x y DATA(0, -1) + 1/4 x DATA(2, 0) - 1/24 x y DATA(0, 2)
+
+ 3 2 3 2 3 2
+ + 1/9 x y DATA(2, 1) - 5/24 x y DATA(2, 0) + 1/9 x y DATA(2, -1)
+
+ 3 2 2 3
+ - 5/4 x y DATA(0, 0) - 1/2 x DATA(1, 0) - 1/12 y x DATA(0, 2)
+
+ 3 3 3
+ + 1/9 y x DATA(2, 1) - 1/9 y x DATA(2, -1) + 2/3 y x DATA(0, 1)
+
+ 3 2 3 2 3 2
+ - 4/9 x y DATA(1, 1) + 1/9 x y DATA(-2, 1) - 5/24 x y DATA(-2, 0)
+
+ 3 2 3 2 3 2
+ - 1/144 x y DATA(-2, 2) + 1/36 x y DATA(1, 2) + 1/36 x y DATA(-1, 2)
+
+ 2 3 3
+ - 1/4 x DATA(-2, 0) - 2/3 y x DATA(0, -1) - 4/9 y x DATA(-1, 1)
+
+ 3 3 3
+ - 4/9 y x DATA(1, 1) - 1/72 y x DATA(-2, 2) + 1/9 y x DATA(-2, 1)
+
+ 3 3 3
+ - 1/9 y x DATA(-2, -1) + 1/72 y x DATA(2, -2) + 1/18 y x DATA(1, 2)
+
+ 3 3 3
+ + 1/18 y x DATA(-1, 2) + 4/9 y x DATA(1, -1) - 1/18 y x DATA(1, -2)
+
+ 3 3 3
+ - 1/18 y x DATA(-1, -2) + 1/72 y x DATA(-2, -2) + 4/9 y x DATA(-1, -1)
+
+ 3 2 3 2 3
+ + 1/12 y x DATA(0, -2) + 1/24 x y DATA(-2, 1) + 1/48 x y DATA(-2, -2)
+
+ 2 3 2 3 2 3
+ - 1/48 x y DATA(2, -2) + 1/24 x y DATA(1, -2) + 1/24 x y DATA(2, -1)
+
+ 2 3 2 3 2 3
+ - 1/24 x y DATA(-2, -1) + 1/12 x y DATA(1, 1) - 1/48 x y DATA(-2, 2)
+
+ 2 3 2 3 2 3
+ + 1/48 x y DATA(2, 2) - 1/24 x y DATA(1, 2) + 1/24 x y DATA(-1, 2)
+
+ 2 3 2 2 2
+ - 1/24 x y DATA(2, 1) + 1/2 x DATA(-1, 0) - 1/6 x y DATA(-2, 1)
+
+ 2 2 2 2 2 2
+ + 1/48 x y DATA(1, 2) - 1/48 x y DATA(-1, 2) + 1/6 x y DATA(2, 1)
+
+ 2 2 2 2 2 2
+ - 5/16 x y DATA(2, 0) + 1/6 x y DATA(2, -1) - 1/96 x y DATA(2, 2)
+
+ 2 3 2 3
+ - 1/24 x y DATA(-1, -2) + 1/12 x y DATA(-1, -1)
+
+ 2 3 2 3
+ - 1/12 x y DATA(1, -1) - 1/12 x y DATA(-1, 1)
+
+> coeffs_as_lc_of_data(%, posn_list_2d_size5);
+bytes used=179213692, alloc=2620960, time=15.78
+bytes used=180223192, alloc=2620960, time=15.84
+ 2 2 2 4
+[COEFF(-2, -2) = - 1/144 x y + 1/288 x y - 1/288 y + 1/144 y - 1/96 x y
+
+ 3 2 2 3 4 3 3
+ + 1/72 y x + 1/96 x y + 1/144 x y + 1/144 x y - 1/144 y
+
+ 2 3 2 4 3 2 4
+ + 1/48 x y - 1/48 y x - 1/288 x y - 1/144 x y + 1/288 y
+
+ 3 3 2 4 3 4 3 2
+ - 1/72 x y , COEFF(-1, -2) = 1/48 x y - 1/36 x y + 1/36 x y
+
+ 2 2 2 3 3 3 3
+ - 1/48 x y + 1/36 y + 1/18 x y - 1/9 x y + 1/18 y - 1/18 y
+
+ 4 2 2 3 2 3
+ - 1/36 y + 1/24 y x - 1/18 x y - 1/18 y x - 1/24 x y + 1/9 x y
+
+ 4 3 3 3 3 2
+ + 1/18 x y , COEFF(0, -2) = 1/12 y x - 1/12 x y - 1/24 x y
+
+ 2 4 3 3 4
+ + 5/48 x y - 5/24 x y - 5/48 x y + 5/24 x y + 1/24 x y , COEFF(1, -2)
+
+ 2 3 2 2 3 3 4
+ = - 1/18 x y - 1/18 y x - 1/24 y x + 1/24 x y - 1/36 x y + 1/18 y
+
+ 3 2 2 3 3 2 4 3 2 2
+ + 1/36 x y - 1/36 y + 1/18 x y - 1/48 x y - 1/18 y + 1/48 x y
+
+ 3 4 4 4
+ + 1/9 x y - 1/9 x y + 1/36 y + 1/18 x y , COEFF(2, -2) = - 1/288 y
+
+ 2 3 3 2 3 4
+ + 1/288 x y - 1/72 x y - 1/48 x y - 1/288 x y - 1/144 x y - 1/144 y
+
+ 2 4 2 3 4 3 2 3
+ + 1/96 x y + 1/48 y x + 1/144 x y - 1/144 x y + 1/144 x y
+
+ 2 2 3 3 2
+ - 1/96 x y + 1/144 y + 1/72 y x + 1/288 y , COEFF(-2, -1) =
+
+ 3 4 4 2 3 2 2
+ - 1/72 x y - 1/72 y + 1/72 x y - 1/24 x y + 1/18 y - 1/18 x y
+
+ 3 4 2 4 2 3 3
+ - 1/36 x y + 1/24 x y + 1/6 y x + 1/18 x y + 1/36 x y - 1/18 y
+
+ 3 3 2 3 2 2 2 3
+ - 1/9 y x + 1/9 x y + 1/72 y - 1/6 x y , COEFF(-1, -1) = 1/12 x y
+
+ 2 2 4 3 3 3 4
+ - 4/9 y - 8/9 x y - 1/12 x y - 1/9 y + 2/9 x y + 4/9 y x + 1/9 y
+
+ 3 3 3 4 2 2 2 3 2
+ - 1/9 x y + 4/9 y + 1/9 x y + 1/3 x y + 8/9 x y - 4/9 x y
+
+ 2 4 3 3 3 3 4
+ - 1/3 y x - 2/9 x y , COEFF(0, -1) = 1/6 x y - 2/3 y x - 1/6 x y
+
+ 3 2 2 3 4
+ + 2/3 x y - 5/3 x y + 5/3 x y - 5/12 x y + 5/12 x y , COEFF(1, -1) =
+
+ 2 2 3 3 4 2 3 3 3
+ - 1/3 x y + 4/9 y x + 1/9 x y + 4/9 y + 2/9 x y - 1/9 x y
+
+ 2 2 4 4 2 3 2
+ - 8/9 x y + 8/9 x y + 1/12 x y - 2/9 x y + 1/3 y x - 4/9 x y
+
+ 3 4 2 3 2 2
+ + 1/9 y - 4/9 y - 1/9 y - 1/12 x y , COEFF(2, -1) = 1/6 x y
+
+ 2 3 2 4 4 4 2 3
+ - 1/6 y x - 1/72 y - 1/24 x y + 1/72 y + 1/72 x y + 1/24 x y
+
+ 3 2 2 3 4 2 3 3
+ + 1/9 x y - 1/18 y - 1/36 x y + 1/18 x y - 1/18 x y + 1/36 x y
+
+ 3 3 3 2
+ + 1/18 y - 1/9 y x - 1/72 x y , COEFF(-2, 0) = 1/12 - 5/24 x y
+
+ 4 2 4 2 2 3 4 3
+ + 1/48 y - 1/16 x y + 5/48 x y - 1/4 x + 1/24 x y + 1/6 x
+
+ 2 2 4 2 4
+ + 5/16 x y - 1/48 x y - 5/48 y - 1/12 x, COEFF(-1, 0) = 1/3 x y - 2/3
+
+ 2 2 4 3 2 2 3 4 2
+ - 5/3 x y + 1/8 x y + 5/6 x y + 1/2 x - 2/3 x - 1/6 y + 5/6 y
+
+ 2 2 3 4
+ - 5/8 x y + 4/3 x - 1/6 x y ,
+
+ 2 3 3 4 4 3 2
+ COEFF(0, 0) = 25/8 x y + x + 1/4 x y - 5/2 x - 5/8 x y - 5/4 x y ,
+
+ 3 2 3 4 2 2 2 2
+ COEFF(1, 0) = 5/6 x y - 1/6 x y - 5/3 x y - 5/6 y + 2/3 + 5/8 x y
+
+ 2 2 4 3 4 4
+ - 1/2 x - 1/8 x y - 2/3 x + 1/3 x y + 1/6 y + 4/3 x, COEFF(2, 0) =
+
+ 2 2 3 2 3 4
+ - 1/12 x + 1/4 x + 5/48 x y - 5/24 x y + 1/6 x - 1/12 - 1/48 y
+
+ 4 2 2 2 2 4 3 4
+ - 1/48 x y + 5/48 y - 5/16 x y + 1/16 x y + 1/24 x y , COEFF(-2, 1)
+
+ 3 2 2 2 3 4
+ = - 1/72 y - 1/18 x y + 1/18 y - 1/6 y x + 1/18 y - 1/36 x y
+
+ 2 4 4 3 3 3 2 2 2
+ + 1/24 x y - 1/72 y - 1/36 x y + 1/9 x y - 1/6 x y - 1/18 x y
+
+ 3 4 2 3 3 4
+ + 1/9 y x + 1/72 x y + 1/24 x y + 1/72 x y , COEFF(-1, 1) = - 2/9 x y
+
+ 2 3 3 3 2 2 3
+ + 8/9 x y - 4/9 y + 1/9 x y - 4/9 x y + 1/3 y x - 2/9 x y
+
+ 3 2 4 4 3 4 2 2 2
+ - 4/9 y x - 1/12 x y + 1/9 y + 1/9 x y + 8/9 x y + 1/3 x y
+
+ 3 2 3 2
+ + 1/9 y - 1/12 x y - 4/9 y, COEFF(0, 1) = - 5/3 x y - 5/3 x y
+
+ 3 4 3 4 3 3 3 3 2
+ - 1/6 x y + 5/12 x y + 5/12 x y - 1/6 x y + 2/3 y x + 2/3 x y ,
+
+ 2 2 3 3 3 4 3
+ COEFF(1, 1) = - 1/3 y x + 1/12 x y + 1/9 x y - 2/9 x y - 2/9 x y
+
+ 2 3 3 2 2 4
+ + 4/9 y - 1/9 y + 8/9 x y + 4/9 y - 4/9 y x - 1/3 x y - 1/9 y
+
+ 3 4 2 4 3 2 2 2
+ + 1/9 x y + 1/12 x y - 4/9 x y + 8/9 x y , COEFF(2, 1) = 1/6 y x
+
+ 4 3 2 3 2 4 2
+ + 1/72 x y + 1/72 x y - 1/18 y + 1/9 y x - 1/24 x y - 1/18 x y
+
+ 3 4 3 2 2 2 3
+ - 1/36 x y + 1/9 x y + 1/6 x y + 1/72 y - 1/18 y - 1/18 x y
+
+ 4 2 3 3 3 2
+ + 1/72 y - 1/24 x y - 1/36 x y , COEFF(-2, 2) = 1/144 x y + 1/48 y x
+
+ 3 3 3 2 3 2 4 2 3
+ + 1/72 x y + 1/144 y + 1/288 x y - 1/144 x y + 1/288 y - 1/48 x y
+
+ 2 2 2 3 4 3 4
+ - 1/144 y + 1/96 x y - 1/288 y - 1/144 x y - 1/288 x y + 1/144 x y
+
+ 2 4 3 2 4 2
+ - 1/96 x y - 1/72 y x , COEFF(-1, 2) = 1/48 x y - 1/9 x y - 1/18 x y
+
+ 3 3 2 2 2 3 4 2 3
+ - 1/18 x y + 1/36 y - 1/48 x y + 1/18 y - 1/36 x y + 1/24 x y
+
+ 3 2 3 2 3 4 4
+ - 1/18 y - 1/24 y x + 1/36 x y + 1/18 y x + 1/18 x y - 1/36 y
+
+ 3 2 3 3 3 2
+ + 1/9 x y , COEFF(0, 2) = 5/48 x y + 1/12 x y - 1/24 x y + 5/24 x y
+
+ 4 3 4 3 3
+ - 5/48 x y + 1/24 x y - 1/12 y x - 5/24 x y , COEFF(1, 2) =
+
+ 3 4 2 2 3 2 3
+ - 1/36 x y - 1/9 x y + 1/48 x y + 1/18 y x + 1/24 y x + 1/9 x y
+
+ 4 2 4 2 3 2 3 2 2
+ + 1/18 x y - 1/48 x y - 1/24 x y - 1/36 y + 1/36 x y - 1/18 x y
+
+ 3 3 4 3 3
+ - 1/18 y - 1/18 x y + 1/36 y + 1/18 y , COEFF(2, 2) = - 1/144 y
+
+ 2 2 2 3 4 3 3 2
+ - 1/96 x y + 1/48 x y - 1/288 y + 1/72 x y + 1/288 x y
+
+ 3 2 4 3 3 2
+ - 1/144 x y - 1/48 y x - 1/288 x y - 1/72 y x - 1/144 x y
+
+ 3 4 2 4 2
+ + 1/144 x y + 1/96 x y + 1/144 y + 1/144 x y + 1/288 y ]
+
+> print_coeffs__lc_of_data(%, "coeffs_dx->coeff_", "fp",
+> "2d.coeffs/2d.cube.order4.smooth0/coeffs-dx.compute.c");
+bytes used=181223344, alloc=2620960, time=15.90
+bytes used=182223500, alloc=2620960, time=15.97
+bytes used=183223664, alloc=2620960, time=16.07
+bytes used=184244420, alloc=2620960, time=16.17
+bytes used=185261976, alloc=2620960, time=16.24
+bytes used=186262132, alloc=2620960, time=16.32
+bytes used=187271400, alloc=2620960, time=16.41
+bytes used=188271672, alloc=2620960, time=16.50
+bytes used=189271940, alloc=2620960, time=16.57
+bytes used=190272092, alloc=2620960, time=16.84
+bytes used=191272872, alloc=2620960, time=16.90
+bytes used=192273040, alloc=2620960, time=16.96
+bytes used=193273564, alloc=2620960, time=17.03
+bytes used=194283560, alloc=2620960, time=17.13
+bytes used=195283924, alloc=2620960, time=17.24
+bytes used=196288796, alloc=2620960, time=17.34
+bytes used=197290992, alloc=2620960, time=17.43
+bytes used=198291176, alloc=2620960, time=17.52
+bytes used=199291660, alloc=2620960, time=17.61
+bytes used=200292092, alloc=2620960, time=17.89
+bytes used=201292244, alloc=2620960, time=18.05
+bytes used=202292640, alloc=2620960, time=18.12
+bytes used=203294780, alloc=2620960, time=18.22
+bytes used=204295016, alloc=2620960, time=18.34
+bytes used=205295216, alloc=2620960, time=18.44
+bytes used=206305080, alloc=2620960, time=18.68
+bytes used=207305332, alloc=2620960, time=18.84
+bytes used=208305696, alloc=2620960, time=18.90
+bytes used=209306900, alloc=2620960, time=19.00
+bytes used=210308068, alloc=2620960, time=19.12
+bytes used=211308248, alloc=2620960, time=19.34
+bytes used=212308496, alloc=2620960, time=19.47
+bytes used=213308676, alloc=2620960, time=19.54
+bytes used=214312144, alloc=2620960, time=19.67
+bytes used=215319752, alloc=2620960, time=19.92
+bytes used=216319980, alloc=2620960, time=20.07
+bytes used=217320236, alloc=2620960, time=20.15
+bytes used=218320488, alloc=2620960, time=20.29
+bytes used=219320656, alloc=2620960, time=20.59
+bytes used=220320808, alloc=2620960, time=20.75
+>
+# d/dy
+> simplify( diff(interp_2d_cube_order4_smooth0,y) );
+bytes used=221321332, alloc=2620960, time=20.87
+bytes used=222321548, alloc=2620960, time=20.93
+bytes used=223321736, alloc=2620960, time=21.00
+bytes used=224321912, alloc=2620960, time=21.06
+ 4 2 4 2
+- 1/12 DATA(0, 2) - 1/12 x y DATA(-1, -1) + 1/8 x y DATA(0, -1)
+
+ 4 2 4 2
+ + 1/12 x y DATA(-1, 1) - 1/96 x y DATA(-2, -2)
+
+ 4 2 3 3
+ - 1/48 x y DATA(-2, 1) + 1/6 y DATA(0, 2) + y DATA(0, 0)
+
+ 3 3 3
+ - 2/3 y DATA(0, 1) + 1/6 y DATA(0, -2) - 2/3 y DATA(0, -1)
+
+ 4 2 2 2 2 2
+ + 1/24 x y DATA(-1, -2) - 5/16 x y DATA(0, 2) + 5/16 x y DATA(0, -2)
+
+ 2 2 3 2 2
+ + 5/8 x y DATA(0, 1) - 2/3 x y DATA(-1, 0) - 5/8 x y DATA(0, -1)
+
+ 3 2 3 2 3
+ + 1/12 x y DATA(-2, 0) + 2/3 x y DATA(-1, 0) + 2/3 x y DATA(1, 0)
+
+ 2 3 2 3 2 3
+ - 1/24 x y DATA(-2, 0) + 5/6 x y DATA(0, -1) - 1/24 x y DATA(2, 0)
+
+ 2 3 4 3 4 3
+ - 5/24 x y DATA(0, 2) - 1/6 x y DATA(-1, 0) - 1/36 x y DATA(-2, -1)
+
+ 4 3 4 3
+ + 1/144 x y DATA(2, -2) - 1/36 x y DATA(1, -2)
+
+ 4 3 4 3 2 3
+ - 1/36 x y DATA(-1, -2) + 1/24 x y DATA(2, 0) + 5/6 x y DATA(0, 1)
+
+ 2 3 4 3
+ - 5/24 x y DATA(0, -2) + 1/9 x y DATA(-1, 1)
+
+ 4 3 4 3 2 3
+ + 1/144 x y DATA(-2, -2) + 1/9 x y DATA(-1, -1) - 5/4 x y DATA(0, 0)
+
+ 4 3
+ + 1/9 x y DATA(1, -1) - 1/12 y DATA(0, 2) - 5/2 y DATA(0, 0)
+
+ 4 3
+ + 4/3 y DATA(0, 1) - 1/12 y DATA(0, -2) + 1/144 x y DATA(2, 2)
+
+ 4 3 4 3 4 3
+ - 1/36 x y DATA(-1, 2) - 1/6 x y DATA(0, 1) + 1/24 x y DATA(0, -2)
+
+ 4 3 4 3 4 3
+ - 1/6 x y DATA(0, -1) + 1/24 x y DATA(0, 2) - 1/36 x y DATA(1, 2)
+
+ 4 3 4 3 4 3
+ - 1/36 x y DATA(2, 1) - 1/6 x y DATA(1, 0) + 1/9 x y DATA(1, 1)
+
+ 4 3 4 3
+ - 1/36 x y DATA(-2, 1) + 1/24 x y DATA(-2, 0)
+
+ 4 3 4 3
+ + 1/144 x y DATA(-2, 2) - 1/36 x y DATA(2, -1) + 4/3 y DATA(0, -1)
+
+ 2 2 2
+ - 1/4 y DATA(0, -2) + 1/2 y DATA(0, -1) - 1/2 y DATA(0, 1)
+
+ 2 3 3
+ + 1/4 y DATA(0, 2) + 2/3 x y DATA(1, 0) - 1/12 x y DATA(2, 0)
+
+ 3 3 3
+ - 5/12 y x DATA(-1, 0) + 5/24 y x DATA(-2, 0) - 5/24 y x DATA(2, 0)
+
+ 3 3 3
+ + 5/12 y x DATA(1, 0) - 1/72 x DATA(-1, 2) + 1/72 x DATA(1, 2)
+
+ 3 3 3
+ - 1/144 x DATA(2, 2) + 1/144 x DATA(2, -2) + 1/18 x DATA(-2, -1)
+
+ 3 3 3
+ - 1/18 x DATA(-2, 1) + 1/144 x DATA(-2, 2) - 1/9 x DATA(1, 1)
+
+ 3 3 4
+ - 1/18 x DATA(2, -1) + 1/18 x DATA(2, 1) + 1/18 x y DATA(2, 1)
+
+ 4 4 4
+ + 1/72 x y DATA(-1, -2) + 1/72 x y DATA(1, -2) - 1/288 x y DATA(2, -2)
+
+ 4 4 4
+ - 5/48 x y DATA(2, 0) - 5/8 x y DATA(0, 0) + 1/3 x y DATA(0, -1)
+
+ 4 4 4
+ - 1/48 x y DATA(0, -2) + 1/3 x y DATA(0, 1) + 1/72 x y DATA(-1, 2)
+
+ 4 4 4
+ + 1/72 x y DATA(1, 2) - 1/288 x y DATA(2, 2) - 1/288 x y DATA(-2, 2)
+
+ 4 4 4
+ - 5/48 x y DATA(-2, 0) + 1/18 x y DATA(-2, 1) - 2/9 x y DATA(1, 1)
+
+ 4 4 4
+ + 5/12 x y DATA(1, 0) + 1/18 x y DATA(2, -1) - 1/48 x y DATA(0, 2)
+
+ 4 4 4
+ - 2/9 x y DATA(-1, 1) - 2/9 x y DATA(1, -1) - 2/9 x y DATA(-1, -1)
+
+ 4 4 4
+ - 1/288 x y DATA(-2, -2) + 5/12 x y DATA(-1, 0) - 1/288 x DATA(-2, 2)
+
+ 3 3 3
+ + 1/9 x DATA(-1, 1) + 1/9 x DATA(1, -1) - 1/9 x DATA(-1, -1)
+
+ 3 3 3
+ - 1/144 x DATA(-2, -2) + 1/72 x DATA(-1, -2) - 1/72 x DATA(1, -2)
+
+ 4 4 4
+ - 1/9 x DATA(1, 1) - 1/6 x DATA(0, -1) + 1/9 x DATA(-1, -1)
+
+ 4 4 4
+ + 1/288 x DATA(-2, -2) - 1/72 x DATA(-1, -2) + 1/48 x DATA(0, -2)
+
+ 4 4 4
+ - 1/72 x DATA(1, -2) + 1/288 x DATA(2, -2) - 1/36 x DATA(-2, -1)
+
+ 4 4
+ + 1/36 x DATA(-2, 1) + 1/18 x DATA(2, -1) + 1/6 x DATA(0, 1)
+
+ 4 4 4
+ - 1/36 x DATA(2, -1) + 1/36 x DATA(2, 1) - 1/48 x DATA(0, 2)
+
+ 4 4 4
+ + 1/72 x DATA(-1, 2) + 1/72 x DATA(1, 2) - 1/288 x DATA(2, 2)
+
+ 4 4
+ - 1/9 x DATA(-1, 1) + 1/9 x DATA(1, -1) + 5/24 x y DATA(2, 0)
+
+ 4 3 3 3
+ - 5/3 x y DATA(1, 0) + 1/4 x y DATA(0, 0) + 1/12 x y DATA(2, 0)
+
+ 3 3 3 3 4
+ + 1/6 x y DATA(-1, 0) - 1/6 x y DATA(1, 0) + 1/18 x y DATA(-2, -1)
+
+ 3 3 2 2
+ - 1/12 x y DATA(-2, 0) + 1/36 x DATA(-2, -1) + 1/18 x DATA(1, -2)
+
+ 2 2 2
+ - 5/48 x DATA(0, -2) + 1/18 x DATA(-1, -2) - 1/288 x DATA(-2, -2)
+
+ - 4/9 x DATA(1, -1) - 4/9 x DATA(-1, 1) + 1/18 x DATA(-2, 1)
+
+ - 1/144 x DATA(2, -2) + 1/18 x DATA(1, -2) - 1/18 x DATA(-1, -2)
+
+ + 1/144 x DATA(-2, -2) + 4/9 x DATA(-1, -1) - 1/18 x DATA(-2, -1)
+
+ + 4/9 x DATA(1, 1) - 1/144 x DATA(-2, 2) + 1/144 x DATA(2, 2)
+
+ - 1/18 x DATA(1, 2) + 1/18 x DATA(-1, 2) - 1/18 x DATA(2, 1)
+
+ 2
+ - 1/288 x DATA(2, -2) + 5/3 x y DATA(-1, 0) - 5/24 x y DATA(-2, 0)
+
+ 2 2 2
+ + 5/48 y x DATA(-2, 0) - 5/3 y x DATA(-1, 0) - 5/3 y x DATA(0, 1)
+
+ 2 2 2
+ + 5/48 y x DATA(0, -2) - 5/3 y x DATA(0, -1) + 5/48 y x DATA(0, 2)
+
+ 2 4 2 4 2
+ + 25/8 y x DATA(0, 0) - 1/24 x y DATA(1, 2) - 1/24 x y DATA(-1, 2)
+
+ 4 2 4 2 2
+ + 1/16 x y DATA(0, 2) - 1/48 x y DATA(2, 1) + 5/48 y x DATA(2, 0)
+
+ 2 2 2
+ - 5/3 y x DATA(1, 0) + 5/6 x DATA(0, -1) - 4/9 x DATA(1, -1)
+
+ 2 2 2
+ + 4/9 x DATA(-1, 1) + 1/288 x DATA(2, 2) - 1/18 x DATA(1, 2)
+
+ 2 2 2
+ - 1/18 x DATA(-1, 2) + 5/48 x DATA(0, 2) - 1/36 x DATA(2, 1)
+
+ 2 2 2
+ + 1/36 x DATA(2, -1) - 5/6 x DATA(0, 1) + 4/9 x DATA(1, 1)
+
+ 2 2 4 2
+ + 1/288 x DATA(-2, 2) - 1/36 x DATA(-2, 1) + 1/12 x y DATA(1, 1)
+
+ 4 2 4 2 4 2
+ + 1/96 x y DATA(-2, 2) - 1/12 x y DATA(1, -1) + 1/96 x y DATA(2, 2)
+
+ 4 2 4 2 4 2
+ - 1/96 x y DATA(2, -2) + 1/24 x y DATA(1, -2) - 1/16 x y DATA(0, -2)
+
+ 4 2 4 2 4 2
+ + 1/48 x y DATA(-2, -1) + 1/48 x y DATA(2, -1) - 1/8 x y DATA(0, 1)
+
+ 2
+ - 4/9 x DATA(-1, -1) + 2/3 DATA(0, 1) + 1/12 DATA(0, -2)
+
+ 2 2 2
+ - 2/3 DATA(0, -1) - 1/3 x y DATA(-1, -1) - 1/3 x y DATA(1, 1)
+
+ 2 2 2 2 2 2
+ - 1/96 x y DATA(-2, 2) + 1/96 x y DATA(2, -2) - 1/6 x y DATA(1, -2)
+
+ 2 2 2 2
+ - 1/6 x y DATA(-1, -2) + 1/96 x y DATA(-2, -2)
+
+ 2 2 2 2 2 2
+ + 1/3 x y DATA(-1, -1) + 1/3 x y DATA(1, -1) - 1/3 x y DATA(-1, 1)
+
+ 2 2 2
+ - 1/18 y x DATA(1, 2) - 1/18 y x DATA(-1, 2) - 1/18 y x DATA(2, 1)
+
+ 2 2 2 2
+ - 1/48 x y DATA(-2, -1) - 1/18 y x DATA(1, -2) - 1/18 y x DATA(-1, -2)
+
+ 2 2 2
+ + 1/288 y x DATA(-2, -2) + 1/288 y x DATA(2, 2) + 8/9 y x DATA(1, 1)
+
+ 2 2 2
+ + 1/288 y x DATA(-2, 2) - 1/18 y x DATA(-2, 1) - 1/18 y x DATA(-2, -1)
+
+ 2 2 2
+ + 1/288 y x DATA(2, -2) + 8/9 y x DATA(-1, -1) + 8/9 y x DATA(1, -1)
+
+ 2 2 2
+ + 8/9 y x DATA(-1, 1) - 1/18 y x DATA(2, -1) + 1/3 x y DATA(1, -1)
+
+ 2 2 2
+ + 1/3 x y DATA(-1, 1) + 1/24 x y DATA(-2, -1) + 1/48 x y DATA(2, -2)
+
+ 2 2 2
+ - 1/6 x y DATA(1, -2) + 1/6 x y DATA(-1, -2) + 1/6 x y DATA(1, 2)
+
+ 2 2 2
+ - 1/6 x y DATA(-1, 2) + 1/24 x y DATA(2, 1) - 1/48 x y DATA(-2, -2)
+
+ - 1/18 x y DATA(1, 2) + 1/18 x y DATA(-1, 2) - 1/9 x y DATA(2, 1)
+
+ - 1/9 x y DATA(2, -1) + 8/9 x y DATA(1, 1) - 1/144 x y DATA(-2, 2)
+
+ + 1/9 x y DATA(-2, 1) + 1/9 x y DATA(-2, -1) + 1/144 x y DATA(2, -2)
+
+ 2 2 2
+ - 1/3 x y DATA(1, 1) - 1/24 x y DATA(-2, 1) + 1/48 x y DATA(-2, 2)
+
+ 2 2
+ - 1/24 x y DATA(2, -1) - 1/48 x y DATA(2, 2) - 8/9 x y DATA(-1, 1)
+
+ 3 3 3 3 3 3
+ + 1/72 x y DATA(2, 2) - 1/36 x y DATA(1, 2) + 1/36 x y DATA(-1, 2)
+
+ 3 3 3 3 3 3
+ - 1/18 x y DATA(2, 1) - 1/18 x y DATA(2, -1) + 1/9 x y DATA(1, -1)
+
+ 3 3
+ + 1/144 x y DATA(2, 2) + 1/72 x y DATA(2, -2) - 1/18 x y DATA(1, -2)
+
+ + 1/18 x y DATA(-1, -2) - 1/144 x y DATA(-2, -2) - 8/9 x y DATA(-1, -1)
+
+ 3 3 3 3
+ + 8/9 x y DATA(1, -1) + 1/36 x y DATA(-1, -2) - 1/72 x y DATA(-2, -2)
+
+ 3 3 3 3 3
+ - 1/9 x y DATA(-1, -1) - 1/9 x y DATA(-1, 1) - 1/72 x y DATA(2, 2)
+
+ 3 3 3 3 3 3
+ + 1/9 x y DATA(1, 1) - 1/72 x y DATA(-2, 2) + 1/18 x y DATA(-2, 1)
+
+ 3 3 3 3
+ + 1/18 x y DATA(-2, -1) + 1/18 x y DATA(2, -1) - 4/9 x y DATA(1, 1)
+
+ 3 3 3 3
+ + 1/72 x y DATA(-2, 2) - 1/18 x y DATA(-2, 1) - 1/36 x y DATA(1, -2)
+
+ 3 3 3
+ + 4/9 x y DATA(-1, 1) + 1/9 x y DATA(1, 2) - 1/9 x y DATA(-1, 2)
+
+ 3 3 2 3
+ + 1/18 x y DATA(2, 1) - 1/12 x y DATA(1, -1) - 1/18 x y DATA(-2, -1)
+
+ 3 3 3
+ - 1/72 x y DATA(2, -2) + 1/9 x y DATA(1, -2) - 1/9 x y DATA(-1, -2)
+
+ 3 3 3
+ + 1/72 x y DATA(-2, -2) + 4/9 x y DATA(-1, -1) - 4/9 x y DATA(1, -1)
+
+ 3 2 3 3 2
+ + 1/48 x y DATA(2, 2) - 1/144 y x DATA(2, 2) - 1/12 x y DATA(-1, 1)
+
+ 3 2 3 2
+ - 1/24 x y DATA(-2, -1) - 1/48 x y DATA(2, -2)
+
+ 3 2 3 2
+ + 1/24 x y DATA(1, -2) - 1/24 x y DATA(-1, -2)
+
+ 3 2 3 2
+ + 1/48 x y DATA(-2, -2) + 1/12 x y DATA(-1, -1)
+
+ 3 2 3 2 3
+ - 1/24 x y DATA(2, 1) + 1/24 x y DATA(2, -1) + 1/9 y x DATA(2, 1)
+
+ 3 3 2 3 2
+ + 1/9 y x DATA(2, -1) + 1/12 x y DATA(1, 1) + 1/24 x y DATA(-2, 1)
+
+ 3 2 3 2 3 2
+ - 1/48 x y DATA(-2, 2) - 1/24 x y DATA(1, 2) + 1/24 x y DATA(-1, 2)
+
+ 3 3 3
+ + 2/9 y x DATA(-1, 1) - 2/9 y x DATA(1, 1) + 1/144 y x DATA(-2, 2)
+
+ 3 3 3
+ - 1/9 y x DATA(-2, 1) - 1/9 y x DATA(-2, -1) - 1/144 y x DATA(2, -2)
+
+ 3 3 3
+ + 1/72 y x DATA(1, 2) - 1/72 y x DATA(-1, 2) - 2/9 y x DATA(1, -1)
+
+ 3 3 3
+ + 1/72 y x DATA(1, -2) - 1/72 y x DATA(-1, -2) + 1/144 y x DATA(-2, -2)
+
+ 3 2 3
+ + 2/9 y x DATA(-1, -1) + 1/36 x y DATA(-2, 1)
+
+ 2 3 2 3
+ - 1/144 x y DATA(-2, -2) - 1/144 x y DATA(2, -2)
+
+ 2 3 2 3 2 3
+ + 1/9 x y DATA(1, -2) + 1/36 x y DATA(2, -1) + 1/36 x y DATA(-2, -1)
+
+ 2 3 2 3 2 3
+ - 4/9 x y DATA(1, 1) - 1/144 x y DATA(-2, 2) - 1/144 x y DATA(2, 2)
+
+ 2 3 2 3 2 3
+ + 1/9 x y DATA(1, 2) + 1/9 x y DATA(-1, 2) + 1/36 x y DATA(2, 1)
+
+ 2 2 2 2 2 2
+ + 1/48 x y DATA(-2, 1) + 1/6 x y DATA(1, 2) + 1/6 x y DATA(-1, 2)
+
+ 2 2 2 2 2 2
+ + 1/48 x y DATA(2, 1) - 1/48 x y DATA(2, -1) - 1/96 x y DATA(2, 2)
+
+ 2 3 2 3 2 3
+ + 1/9 x y DATA(-1, -2) - 4/9 x y DATA(-1, -1) - 4/9 x y DATA(1, -1)
+
+ 2 3
+ - 4/9 x y DATA(-1, 1)
+
+> coeffs_as_lc_of_data(%, posn_list_2d_size5);
+bytes used=225340376, alloc=2752008, time=21.13
+bytes used=226340564, alloc=2752008, time=21.19
+ 2 3 3 4 3 3
+[COEFF(-2, -2) = - 1/288 x - 1/72 x y + 1/144 x + 1/144 x y - 1/144 x
+
+ 2 3 3 2 2 3 2 4 2
+ - 1/144 x y + 1/72 x y + 1/96 x y + 1/48 x y - 1/96 x y
+
+ 2 4 3 4 2
+ + 1/288 y x - 1/288 x y + 1/144 y x + 1/288 x - 1/144 x y - 1/48 x y ,
+
+ 2 4 3 3 2 2
+ COEFF(-1, -2) = 1/18 x - 1/36 x y - 1/72 y x - 1/18 y x + 1/6 x y
+
+ 2 3 3 3 2 4 2
+ + 1/9 x y + 1/72 x - 1/24 x y + 1/24 x y - 1/18 x + 1/18 x y
+
+ 4 3 3 3 4 2 2
+ - 1/72 x - 1/9 x y + 1/36 x y + 1/72 x y - 1/6 x y , COEFF(0, -2) =
+
+ 4 2 2 4 2 3
+ - 1/48 x y - 5/48 x + 5/48 y x + 1/48 x + 1/12 - 1/12 y - 5/24 x y
+
+ 3 2 2 2 4 3 4 2
+ + 1/6 y + 5/16 x y - 1/4 y + 1/24 x y - 1/16 x y , COEFF(1, -2) =
+
+ 3 2 2 2 3 2 4 3
+ - 1/18 x y + 1/24 x y - 1/6 x y - 1/72 x - 1/6 x y - 1/36 x y
+
+ 4 3 3 2 4 2 3 3
+ - 1/72 x + 1/9 x y + 1/72 y x + 1/18 x + 1/24 x y - 1/36 x y
+
+ 2 3 2 4 3
+ + 1/9 x y - 1/18 y x + 1/18 x + 1/72 x y, COEFF(2, -2) = - 1/144 y x
+
+ 2 4 3 2 2 2
+ + 1/288 y x + 1/144 x y + 1/96 x y + 1/144 x y - 1/144 x - 1/288 x
+
+ 4 3 3 2 3 3 2 3
+ - 1/288 x y + 1/144 x - 1/48 x y + 1/72 x y + 1/48 x y - 1/72 x y
+
+ 4 2 3 4 2 2
+ + 1/288 x - 1/144 x y - 1/96 x y , COEFF(-2, -1) = 1/24 x y
+
+ 3 2 2 2 2 4 2 3
+ - 1/24 x y + 1/9 x y - 1/48 x y - 1/18 y x + 1/48 x y - 1/18 x y
+
+ 4 2 3 4 3 3 3 2
+ + 1/18 x y + 1/36 x y - 1/36 x + 1/18 x y + 1/18 x + 1/36 x
+
+ 3 4 3 3 2
+ - 1/18 x - 1/9 y x - 1/36 x y , COEFF(-1, -1) = 1/12 x y - 8/9 x y
+
+ 3 3 3 2 4 4 3 2 2
+ + 4/9 x y - 1/9 x y - 4/9 x - 2/9 x y + 1/9 x y + 1/3 x y
+
+ 4 2 3 2 3 2 4 2
+ + 1/9 x - 4/9 x y + 8/9 y x + 2/9 y x + 4/9 x - 1/3 x y - 1/12 x y
+
+ 3 4 2 2 2 2
+ - 1/9 x , COEFF(0, -1) = 1/3 x y - 5/3 y x + 5/6 x - 2/3 - 5/8 x y
+
+ 3 4 4 3 2 3 2 4 2
+ + 4/3 y - 2/3 y - 1/6 x - 1/6 x y + 5/6 x y + 1/2 y + 1/8 x y ,
+
+ 3 2 2 3 4 3
+ COEFF(1, -1) = 1/9 x + 8/9 x y + 1/3 x y - 4/9 x y + 1/9 x y
+
+ 4 3 2 4 2 2 3 3
+ - 2/9 x y - 1/12 x y - 1/12 x y + 8/9 y x - 4/9 x + 1/9 x y
+
+ 2 2 3 4 2 3
+ + 1/3 x y - 4/9 x - 2/9 y x + 1/9 x - 4/9 x y , COEFF(2, -1) =
+
+ 4 3 2 3 3 2 2 4 2
+ - 1/36 x + 1/9 y x + 1/36 x - 1/18 x y - 1/48 x y + 1/48 x y
+
+ 2 4 3 2 3 2 3
+ - 1/18 y x + 1/18 x - 1/36 x y - 1/24 x y + 1/24 x y + 1/18 x y
+
+ 2 3 4 3 3 3
+ + 1/36 x y + 1/18 x y - 1/18 x - 1/9 x y, COEFF(-2, 0) = - 1/12 x y
+
+ 4 2 2 3 3 3
+ - 5/48 x y + 5/48 y x - 1/24 x y + 5/24 y x + 1/12 x y - 5/24 x y
+
+ 4 3 2 3 4 3 3 3
+ + 1/24 x y , COEFF(-1, 0) = 2/3 x y - 1/6 x y + 1/6 x y + 5/3 x y
+
+ 3 2 4 3
+ - 5/12 y x - 5/3 y x + 5/12 x y - 2/3 x y ,
+
+ 2 3 4 2 3 4 3
+ COEFF(0, 0) = 25/8 y x + y - 5/8 x y - 5/4 x y + 1/4 x y - 5/2 y,
+
+ 2 3 4 4 3 3 3
+ COEFF(1, 0) = 2/3 x y + 5/12 x y - 5/3 x y - 1/6 x y - 1/6 x y
+
+ 2 3 3 3 3
+ - 5/3 y x + 5/12 y x + 2/3 x y , COEFF(2, 0) = 5/24 x y + 1/12 x y
+
+ 4 3 2 2 3 3 3 4
+ + 1/24 x y + 5/48 y x - 1/24 x y - 1/12 x y - 5/24 y x - 5/48 x y,
+
+ 3 3 2 4 3 4 2
+ COEFF(-2, 1) = - 1/18 x + 1/24 x y + 1/18 x y - 1/9 y x - 1/48 x y
+
+ 3 3 2 4 3 2 2
+ + 1/9 x y + 1/18 x y - 1/24 x y + 1/36 x - 1/18 x y + 1/48 x y
+
+ 2 3 4 3 2 2
+ + 1/36 x y + 1/18 x - 1/36 x y - 1/36 x - 1/18 y x , COEFF(-1, 1) =
+
+ 3 3 4 3 2 2 2 3 4 3
+ - 1/9 x y - 1/9 x + 4/9 x y + 1/3 x y - 1/3 x y + 1/9 x + 1/9 x y
+
+ 2 3 2 2 2 3 4
+ + 8/9 y x - 1/12 x y + 4/9 x - 4/9 x y - 4/9 x - 2/9 x y - 8/9 x y
+
+ 4 2 3 4 4 2 2
+ + 1/12 x y + 2/9 y x , COEFF(0, 1) = 1/6 x - 1/8 x y - 1/2 y + 2/3
+
+ 2 3 4 3 2 2 2 2 4
+ + 5/6 x y + 4/3 y - 1/6 x y - 5/6 x + 5/8 x y - 5/3 y x + 1/3 x y
+
+ 3 2 3 4 2 4
+ - 2/3 y , COEFF(1, 1) = - 1/3 x y - 4/9 x y + 1/12 x y - 1/9 x
+
+ 3 2 3 3 2 2 2 3 4
+ + 1/12 x y + 1/9 x y + 4/9 x - 1/3 x y - 2/9 y x - 2/9 x y
+
+ 2 3 4 3 3 2
+ + 4/9 x + 8/9 x y - 4/9 x y + 1/9 x y - 1/9 x + 8/9 y x , COEFF(2, 1)
+
+ 3 2 2 2 2 2 2 3
+ = 1/18 x y - 1/18 y x - 1/36 x + 1/48 x y + 1/24 x y + 1/36 x y
+
+ 3 2 3 3 4 2 3
+ - 1/24 x y - 1/18 x y - 1/9 x y - 1/48 x y - 1/18 x + 1/9 y x
+
+ 3 4 3 4 4
+ + 1/18 x - 1/36 x y + 1/36 x + 1/18 x y, COEFF(-2, 2) = - 1/144 x
+
+ 2 2 4 2 4 2 2 3
+ + 1/288 y x + 1/288 x + 1/96 x y - 1/288 x - 1/96 x y + 1/72 x y
+
+ 2 3 3 4 3 2 2
+ - 1/144 x y - 1/144 x y + 1/144 x - 1/288 x y - 1/48 x y + 1/48 x y
+
+ 3 3 3 4 3 4
+ - 1/72 x y + 1/144 y x + 1/144 x y , COEFF(-1, 2) = 1/72 x
+
+ 3 3 3 4 2 3 2
+ + 1/36 x y - 1/72 x - 1/24 x y + 1/18 x y - 1/72 y x - 1/18 x
+
+ 3 2 2 3 2 2 2 2 3
+ + 1/24 x y + 1/9 x y + 1/6 x y - 1/6 x y - 1/18 y x - 1/9 x y
+
+ 4 3 4 2
+ - 1/36 x y + 1/18 x + 1/72 x y, COEFF(0, 2) = - 1/12 - 1/12 y + 5/48 x
+
+ 4 2 4 2 4 2 2 2 3
+ + 1/16 x y - 1/48 x + 5/48 y x - 1/48 x y - 5/16 x y - 5/24 x y
+
+ 3 4 3 2
+ + 1/6 y + 1/24 x y + 1/4 y , COEFF(1, 2) = - 1/18 x - 1/18 x y
+
+ 3 3 3 4 2 2 4
+ - 1/36 x y + 1/72 x + 1/72 x y + 1/6 x y - 1/18 y x + 1/72 x
+
+ 2 3 2 3 4 2 2 3 2 2
+ - 1/18 x - 1/24 x y + 1/9 x y - 1/24 x y + 1/9 x y + 1/6 x y
+
+ 3 4 3 3 4 2
+ + 1/72 y x - 1/36 x y , COEFF(2, 2) = 1/144 x y - 1/144 x + 1/96 x y
+
+ 4 4 2 2 2 3
+ - 1/288 x + 1/144 x - 1/288 x y + 1/288 x - 1/96 x y - 1/72 x y
+
+ 2 3 3 3 2 3 2
+ - 1/48 x y + 1/72 x y - 1/144 y x - 1/144 x y + 1/288 y x
+
+ 4 3 3 2
+ + 1/144 x y + 1/48 x y ]
+
+> print_coeffs__lc_of_data(%, "coeffs_dy->coeff_", "fp",
+> "2d.coeffs/2d.cube.order4.smooth0/coeffs-dy.compute.c");
+bytes used=227340944, alloc=2817532, time=21.27
+bytes used=228341108, alloc=2817532, time=21.34
+bytes used=229341284, alloc=2817532, time=21.43
+bytes used=230364276, alloc=2817532, time=21.51
+bytes used=231366896, alloc=2817532, time=21.59
+bytes used=232387828, alloc=2817532, time=21.65
+bytes used=233410164, alloc=2817532, time=21.73
+bytes used=234411164, alloc=2817532, time=21.82
+bytes used=235411816, alloc=2817532, time=21.89
+bytes used=236412028, alloc=2817532, time=22.25
+bytes used=237412372, alloc=2817532, time=22.32
+bytes used=238412628, alloc=2817532, time=22.39
+bytes used=239412864, alloc=2817532, time=22.45
+bytes used=240413072, alloc=2817532, time=22.53
+bytes used=241413260, alloc=2817532, time=22.64
+bytes used=242415104, alloc=2817532, time=22.74
+bytes used=243422528, alloc=2817532, time=22.84
+bytes used=244422796, alloc=2817532, time=22.92
+bytes used=245434308, alloc=2817532, time=23.25
+bytes used=246434640, alloc=2817532, time=23.47
+bytes used=247434804, alloc=2817532, time=23.55
+bytes used=248445404, alloc=2817532, time=23.66
+bytes used=249445736, alloc=2817532, time=23.79
+bytes used=250454324, alloc=2817532, time=24.11
+bytes used=251454648, alloc=2817532, time=24.31
+bytes used=252454820, alloc=2817532, time=24.38
+bytes used=253455412, alloc=2817532, time=24.47
+bytes used=254455864, alloc=2817532, time=24.59
+bytes used=255456212, alloc=2817532, time=24.96
+bytes used=256456488, alloc=2817532, time=25.03
+bytes used=257456656, alloc=2817532, time=25.12
+bytes used=258456848, alloc=2817532, time=25.35
+bytes used=259457064, alloc=2817532, time=25.61
+bytes used=260457280, alloc=2817532, time=25.69
+bytes used=261457952, alloc=2817532, time=25.80
+bytes used=262458396, alloc=2817532, time=26.10
+bytes used=263458644, alloc=2817532, time=26.17
+>
+# d^2/dx^2
+> simplify( diff(interp_2d_cube_order4_smooth0,x,x) );
+bytes used=264458908, alloc=2817532, time=26.30
+bytes used=265459400, alloc=2817532, time=26.38
+bytes used=266459604, alloc=2817532, time=26.45
+ 3 3
+- 1/12 DATA(2, 0) - 5/24 y DATA(0, 2) + 5/12 y DATA(0, 1)
+
+ 3 3 2 2
+ + 5/24 y DATA(0, -2) - 5/12 y DATA(0, -1) - 1/8 x y DATA(0, 2)
+
+ 2 2 2 2 2 2
+ - 1/8 x y DATA(0, -2) + 2 x y DATA(0, 1) + 2 x y DATA(0, -1)
+
+ 2 3 2 3 2 3
+ + 1/2 x y DATA(0, -1) + 1/4 x y DATA(0, 2) - 1/2 x y DATA(0, 1)
+
+ 2 3
+ - 1/4 x y DATA(0, -2) + 5/24 y DATA(0, 2) - 5/3 y DATA(0, 1)
+
+ 2
+ - 5/24 y DATA(0, -2) + 5/3 y DATA(0, -1) + 5/48 y DATA(0, -2)
+
+ 2 2 2
+ - 5/3 y DATA(0, -1) - 5/3 y DATA(0, 1) + 5/48 y DATA(0, 2)
+
+ 2 2 2
+ + 2 y x DATA(0, 1) + 1/4 y x DATA(0, -2) - 2 y x DATA(0, -1)
+
+ 2
+ - 1/4 y x DATA(0, 2) - 5/2 DATA(0, 0) + 4/3 DATA(1, 0) - 1/12 DATA(-2, 0)
+
+ 2 2 2
+ + 4/3 DATA(-1, 0) + 2/3 x y DATA(-1, -1) - 4/3 x y DATA(1, 1)
+
+ 2 2 2 2 2 2
+ - 1/48 x y DATA(-2, 2) - 1/48 x y DATA(2, -2) + 1/12 x y DATA(1, -2)
+
+ 2 2 2 2
+ + 1/12 x y DATA(-1, -2) - 1/48 x y DATA(-2, -2)
+
+ 2 2 2 2 2 2
+ - 4/3 x y DATA(-1, -1) - 4/3 x y DATA(1, -1) - 4/3 x y DATA(-1, 1)
+
+ 2 2 2
+ + 1/6 y x DATA(1, 2) + 1/6 y x DATA(-1, 2) + 1/3 y x DATA(2, 1)
+
+ 2 2 2 2
+ + 1/3 x y DATA(-2, -1) - 1/6 y x DATA(1, -2) - 1/6 y x DATA(-1, -2)
+
+ 2 2 2
+ + 1/24 y x DATA(-2, -2) - 1/24 y x DATA(2, 2) - 4/3 y x DATA(1, 1)
+
+ 2 2 2
+ - 1/24 y x DATA(-2, 2) + 1/3 y x DATA(-2, 1) - 1/3 y x DATA(-2, -1)
+
+ 2 2 2
+ + 1/24 y x DATA(2, -2) + 4/3 y x DATA(-1, -1) + 4/3 y x DATA(1, -1)
+
+ 2 2 2
+ - 4/3 y x DATA(-1, 1) - 1/3 y x DATA(2, -1) - 2/3 x y DATA(1, -1)
+
+ 2 2 2
+ + 2/3 x y DATA(-1, 1) - 1/3 x y DATA(-2, -1) - 1/48 x y DATA(2, -2)
+
+ 2 2 2
+ + 1/24 x y DATA(1, -2) - 1/24 x y DATA(-1, -2) + 1/24 x y DATA(1, 2)
+
+ 2 2 2
+ - 1/24 x y DATA(-1, 2) + 1/3 x y DATA(2, 1) + 1/48 x y DATA(-2, -2)
+
+ + 1/12 x y DATA(1, 2) - 1/12 x y DATA(-1, 2) + 1/3 x y DATA(2, 1)
+
+ - 1/3 x y DATA(2, -1) - 2/3 x y DATA(1, 1) + 1/24 x y DATA(-2, 2)
+
+ - 1/3 x y DATA(-2, 1) + 1/3 x y DATA(-2, -1) + 1/24 x y DATA(2, -2)
+
+ 2 2 2
+ - 2/3 x y DATA(1, 1) - 1/3 x y DATA(-2, 1) + 1/48 x y DATA(-2, 2)
+
+ 2 2
+ + 1/3 x y DATA(2, -1) - 1/48 x y DATA(2, 2) + 2/3 x y DATA(-1, 1)
+
+ - 1/24 x y DATA(2, 2) - 1/12 x y DATA(1, -2) + 1/12 x y DATA(-1, -2)
+
+ - 1/24 x y DATA(-2, -2) - 2/3 x y DATA(-1, -1) + 2/3 x y DATA(1, -1)
+
+ 3 3 3
+ + 1/24 x y DATA(2, 2) + 1/12 x y DATA(2, -1) + 1/6 x y DATA(1, 1)
+
+ 3 3 3
+ - 1/24 x y DATA(-2, 2) + 1/12 x y DATA(-2, 1) - 1/6 x y DATA(-1, 1)
+
+ 3 3 3
+ - 1/12 x y DATA(1, 2) + 1/12 x y DATA(-1, 2) - 1/12 x y DATA(2, 1)
+
+ 3 3 3
+ - 1/12 x y DATA(-2, -1) - 1/24 x y DATA(2, -2) + 1/12 x y DATA(1, -2)
+
+ 3 3 3
+ - 1/12 x y DATA(-1, -2) + 1/24 x y DATA(-2, -2) + 1/6 x y DATA(-1, -1)
+
+ 3 2 3 2 3
+ - 1/6 x y DATA(1, -1) - 1/12 x y DATA(-2, 1) - 1/24 x y DATA(-2, -2)
+
+ 2 3 2 3 2 3
+ - 1/24 x y DATA(2, -2) + 1/6 x y DATA(1, -2) + 1/12 x y DATA(2, -1)
+
+ 2 3 2 3 2 3
+ + 1/12 x y DATA(-2, -1) + 1/3 x y DATA(1, 1) + 1/24 x y DATA(-2, 2)
+
+ 2 3 2 3 2 3
+ + 1/24 x y DATA(2, 2) - 1/6 x y DATA(1, 2) - 1/6 x y DATA(-1, 2)
+
+ 2 3 2 2 2 2
+ - 1/12 x y DATA(2, 1) + 1/3 x y DATA(-2, 1) + 1/12 x y DATA(1, 2)
+
+ 2 2 2 2 2 2
+ + 1/12 x y DATA(-1, 2) + 1/3 x y DATA(2, 1) + 1/3 x y DATA(2, -1)
+
+ 2 2 2 3 2 3
+ - 1/48 x y DATA(2, 2) + 1/6 x y DATA(-1, -2) - 1/3 x y DATA(-1, -1)
+
+ 2 3 2 3 4
+ - 1/3 x y DATA(1, -1) + 1/3 x y DATA(-1, 1) - 1/8 x y DATA(-2, 0)
+
+ 4 4 4
+ + 1/48 x y DATA(2, -2) - 1/24 x y DATA(1, -2) + 1/24 x y DATA(-1, -2)
+
+ 4 4 4
+ - 1/48 x y DATA(-2, -2) - 1/6 x y DATA(-1, -1) + 1/6 x y DATA(1, -1)
+
+ 3 3 2
+ - 1/9 y DATA(-1, -2) + 1/9 y DATA(-1, 2) + 1/2 x DATA(2, 0)
+
+ 2 2 2
+ + 3 x DATA(0, 0) - 2 x DATA(1, 0) + 1/2 x DATA(-2, 0)
+
+ 2 3
+ - 2 x DATA(-1, 0) - 1/144 y DATA(2, 2) - 1/18 y DATA(-2, 1)
+
+ 2 2
+ + 1/18 y DATA(-2, -1) - 1/144 y DATA(2, -2) + 5/2 x y DATA(1, 0)
+
+ 2 2 2 2 2 2
+ + 5/2 x y DATA(-1, 0) - 5/8 x y DATA(2, 0) - 15/4 x y DATA(0, 0)
+
+ 2 2 2 3
+ - 5/8 x y DATA(-2, 0) - 5/8 x y DATA(2, 0) + 2/9 y DATA(1, -1)
+
+ 3
+ - 2/9 y DATA(-1, 1) + 1/2 x DATA(2, 0) - x DATA(1, 0) - 1/2 x DATA(-2, 0)
+
+ 3 3 3
+ + 2/9 y DATA(-1, -1) + 1/9 y DATA(1, 2) + 1/72 y DATA(2, 1)
+
+ 3 3 3
+ - 1/72 y DATA(2, -1) - 2/9 y DATA(1, 1) - 1/144 y DATA(-2, 2)
+
+ 3 3 3
+ + 1/72 y DATA(-2, 1) - 1/72 y DATA(-2, -1) + 1/144 y DATA(2, -2)
+
+ 3 2 4 4
+ - 1/9 y DATA(1, -2) - 1/2 x y DATA(1, 0) + 1/18 y DATA(-1, 2)
+
+ 4 4 4
+ - 1/288 y DATA(-2, -2) + 5/12 y DATA(0, -1) - 2/9 y DATA(1, -1)
+
+ 4 4 4
+ + 1/3 y DATA(-1, 0) - 2/9 y DATA(-1, 1) - 2/9 y DATA(-1, -1)
+
+ 4 4 4
+ + 5/12 y DATA(0, 1) - 1/288 y DATA(-2, 2) + 1/72 y DATA(-2, 1)
+
+ 4 4 4
+ - 2/9 y DATA(1, 1) + 1/72 y DATA(-2, -1) - 1/288 y DATA(2, -2)
+
+ 4 2 4 4
+ + 1/18 y DATA(1, -2) - 1/12 x y DATA(1, 2) - 5/48 y DATA(0, -2)
+
+ 4 4 4
+ + 1/18 y DATA(-1, -2) - 1/48 y DATA(-2, 0) - 5/48 y DATA(0, 2)
+
+ 4 4 4
+ + 1/72 y DATA(2, 1) - 1/48 y DATA(2, 0) + 1/72 y DATA(2, -1)
+
+ 4 4 4
+ - 5/8 y DATA(0, 0) + 1/3 y DATA(1, 0) - 1/288 y DATA(2, 2)
+
+ 4 2 4 2 4
+ + 1/18 y DATA(1, 2) - 1/12 x y DATA(-1, 2) - 1/2 x y DATA(0, -1)
+
+ 2 4 2 4 2 4
+ + 1/3 x y DATA(1, -1) - 1/2 x y DATA(-1, 0) + 1/48 x y DATA(-2, -2)
+
+ 2 4 2 4 2 4
+ + 1/48 x y DATA(2, 2) + 1/8 x y DATA(0, 2) - 1/12 x y DATA(2, 1)
+
+ 2 4 2 4 2 4
+ + 1/8 x y DATA(2, 0) - 1/12 x y DATA(2, -1) - 1/12 x y DATA(-2, -1)
+
+ 2 4 2 4 2 4
+ + 1/48 x y DATA(2, -2) - 1/12 x y DATA(1, -2) + 1/8 x y DATA(0, -2)
+
+ 2 4 2 4 4
+ - 1/12 x y DATA(-1, -2) + 1/8 x y DATA(-2, 0) - 1/12 x y DATA(2, -1)
+
+ 4 4 4
+ + 1/4 x y DATA(-1, 0) - 1/4 x y DATA(1, 0) + 1/6 x y DATA(1, 1)
+
+ 4 4 2 4
+ - 1/48 x y DATA(-2, 2) + 1/12 x y DATA(-2, 1) + 3/4 x y DATA(0, 0)
+
+ 2 4 2 4 4
+ + 1/3 x y DATA(-1, 1) + 1/3 x y DATA(-1, -1) - 1/6 x y DATA(-1, 1)
+
+ 4 4 4
+ + 1/12 x y DATA(-2, -1) - 1/24 x y DATA(1, 2) + 1/48 x y DATA(2, 2)
+
+ 4 4 4
+ + 1/24 x y DATA(-1, 2) - 1/12 x y DATA(2, 1) + 1/8 x y DATA(2, 0)
+
+ 2 2 2
+ - 1/18 y DATA(1, 2) - 1/18 y DATA(-1, 2) + 1/288 y DATA(-2, -2)
+
+ 2 2 2
+ + 8/9 y DATA(1, -1) - 5/3 y DATA(-1, 0) + 8/9 y DATA(-1, 1)
+
+ 2 2 2
+ + 8/9 y DATA(-1, -1) + 1/288 y DATA(-2, 2) - 1/18 y DATA(-2, 1)
+
+ 2 2 2
+ + 8/9 y DATA(1, 1) - 1/18 y DATA(-2, -1) + 1/288 y DATA(2, -2)
+
+ 2 2
+ + 1/288 y DATA(2, 2) + 1/144 y DATA(2, 2) - 1/18 y DATA(2, 1)
+
+ 2 2 2
+ + 5/48 y DATA(2, 0) - 1/18 y DATA(2, -1) + 25/8 y DATA(0, 0)
+
+ 2
+ - 5/3 y DATA(1, 0) - 1/9 y DATA(1, 2) - 1/9 y DATA(-1, 2)
+
+ - 1/18 y DATA(2, 1) + 1/18 y DATA(2, -1) + 8/9 y DATA(1, 1)
+
+ 2 2
+ + 1/144 y DATA(-2, 2) - 1/18 y DATA(1, -2) - 1/18 y DATA(-1, -2)
+
+ 2
+ + 5/48 y DATA(-2, 0) + 1/9 y DATA(1, -2) + 1/9 y DATA(-1, -2)
+
+ - 1/144 y DATA(-2, -2) - 8/9 y DATA(-1, -1) - 8/9 y DATA(1, -1)
+
+ 2 4 2 4
+ + 8/9 y DATA(-1, 1) - 1/2 x y DATA(0, 1) + 1/48 x y DATA(-2, 2)
+
+ 2 4 2 4 2
+ - 1/12 x y DATA(-2, 1) + 1/3 x y DATA(1, 1) - 5/4 x y DATA(-1, 0)
+
+ 2 2 3
+ + 5/4 x y DATA(1, 0) + 5/8 x y DATA(-2, 0) + 1/144 y DATA(-2, -2)
+
+ + x DATA(-1, 0)
+
+> coeffs_as_lc_of_data(%, posn_list_2d_size5);
+bytes used=267463800, alloc=2817532, time=26.51
+ 2 4 2 2 4 2 2
+[COEFF(-2, -2) = 1/48 x y + 1/48 x y + 1/288 y - 1/288 y - 1/48 x y
+
+ 2 3 4 3 2 3
+ + 1/24 y x + 1/24 x y - 1/48 x y + 1/144 y - 1/144 y - 1/24 x y
+
+ 4 2 2 2
+ - 1/24 x y, COEFF(-1, -2) = 1/24 x y + 1/12 x y - 1/24 x y + 1/12 x y
+
+ 3 2 4 3 2 4 2
+ - 1/9 y + 1/9 y - 1/12 x y - 1/12 x y - 1/18 y + 1/18 y - 1/6 y x
+
+ 2 3 2 2 3
+ + 1/6 x y , COEFF(0, -2) = - 5/24 y + 5/48 y + 1/4 y x + 5/24 y
+
+ 2 2 2 3 4 2 4 2
+ - 1/8 x y - 1/4 x y - 5/48 y + 1/8 x y , COEFF(1, -2) = 1/24 x y
+
+ 2 3 2 2 4 2
+ - 1/12 x y - 1/6 y x - 1/9 y + 1/12 x y + 1/18 y - 1/18 y
+
+ 3 2 3 4 2 4
+ + 1/12 x y + 1/6 x y + 1/9 y - 1/24 x y - 1/12 x y , COEFF(2, -2) =
+
+ 2 4 4 2 2 4
+ - 1/48 x y - 1/288 y + 1/48 x y + 1/24 y x + 1/24 x y + 1/48 x y
+
+ 3 2 2 2 2 3 3
+ - 1/144 y + 1/144 y - 1/48 x y + 1/288 y - 1/24 x y - 1/24 x y ,
+
+ 2 2 3 2 2 3
+ COEFF(-2, -1) = 1/3 x y + 1/3 x y - 1/72 y - 1/18 y + 1/12 x y
+
+ 4 3 2 4 2 2
+ + 1/18 y + 1/12 x y - 1/12 x y - 1/12 x y - 1/3 y x - 1/3 x y
+
+ 4 4 2 2 4
+ + 1/72 y , COEFF(-1, -1) = - 1/6 x y + 2/3 x y - 8/9 y + 1/3 x y
+
+ 2 2 2 2 3 3 4 2 3
+ + 8/9 y - 4/3 x y + 4/3 y x + 2/9 y + 1/6 x y - 2/9 y - 1/3 x y
+
+ 2 3 2 2 4 2
+ - 2/3 x y, COEFF(0, -1) = 1/2 x y + 2 x y + 5/12 y - 5/3 y
+
+ 2 4 2 3 2 4
+ - 1/2 x y - 2 y x - 5/12 y + 5/3 y, COEFF(1, -1) = 1/3 x y + 2/3 x y
+
+ 4 3 2 2 2 4 2 3
+ + 1/6 x y + 2/9 y - 4/3 x y - 8/9 y - 2/3 x y - 2/9 y - 1/3 x y
+
+ 3 2 2 2 2 4
+ - 1/6 x y + 8/9 y + 4/3 y x , COEFF(2, -1) = - 1/18 y - 1/12 x y
+
+ 4 2 2 2 2 3
+ - 1/12 x y + 1/3 x y + 1/3 x y + 1/18 y - 1/3 x y + 1/12 x y
+
+ 3 3 4 2 2
+ - 1/72 y + 1/12 x y + 1/72 y - 1/3 y x , COEFF(-2, 0) = 1/2 x
+
+ 2 4 2 4 2 2 2
+ + 1/8 x y + 5/8 x y - 1/48 y - 1/12 + 5/48 y - 5/8 x y - 1/2 x
+
+ 4 2 2 2 4 4
+ - 1/8 x y , COEFF(-1, 0) = 4/3 + 5/2 x y - 2 x + 1/4 x y + 1/3 y + x
+
+ 2 4 2 2
+ - 1/2 x y - 5/4 x y - 5/3 y ,
+
+ 2 4 2 4 2 2 2
+ COEFF(0, 0) = 3 x - 5/8 y + 3/4 x y - 5/2 - 15/4 x y + 25/8 y ,
+
+ 4 2 2 2 2 2 4
+ COEFF(1, 0) = - 1/4 x y + 5/2 x y + 5/4 x y - 5/3 y - 2 x + 1/3 y
+
+ 2 4 2 2 2 4
+ - 1/2 x y + 4/3 - x, COEFF(2, 0) = - 5/8 x y + 1/2 x + 1/8 x y
+
+ 2 4 2 2 4
+ + 1/8 x y - 5/8 x y + 1/2 x - 1/12 + 5/48 y - 1/48 y , COEFF(-2, 1) =
+
+ 4 2 2 2 2 2 4
+ - 1/18 y + 1/12 x y + 1/3 y x - 1/3 x y + 1/3 x y - 1/12 x y
+
+ 3 3 2 4 2 3
+ + 1/12 x y + 1/72 y - 1/18 y + 1/72 y - 1/3 x y - 1/12 x y ,
+
+ 3 2 4 2 4
+ COEFF(-1, 1) = - 2/9 y - 4/3 y x - 1/6 x y + 2/3 x y + 1/3 x y
+
+ 2 2 3 2 3 2 2 4
+ + 2/3 x y + 1/3 x y + 8/9 y - 1/6 x y - 4/3 x y + 8/9 y - 2/9 y ,
+
+ 3 2 2 2 2 4 4
+ COEFF(0, 1) = 5/12 y + 2 x y - 5/3 y - 1/2 x y - 5/3 y + 5/12 y
+
+ 2 3 2 4 2 4 3
+ - 1/2 x y + 2 y x , COEFF(1, 1) = - 2/9 y + 1/3 x y + 1/6 x y
+
+ 3 4 2 2 2 2 3 2
+ - 2/9 y + 8/9 y + 1/6 x y - 2/3 x y - 4/3 x y + 1/3 x y + 8/9 y
+
+ 2 3 2
+ - 4/3 y x - 2/3 x y, COEFF(2, 1) = 1/3 x y - 1/18 y + 1/72 y + 1/3 x y
+
+ 2 3 2 4 2 2 2 2 4
+ - 1/12 x y + 1/3 y x + 1/72 y + 1/3 x y - 1/18 y - 1/12 x y
+
+ 4 3 2 2 3
+ - 1/12 x y - 1/12 x y , COEFF(-2, 2) = 1/48 x y - 1/24 y x - 1/24 x y
+
+ 2 2 2 2 3 2 4 3
+ - 1/48 x y + 1/288 y + 1/144 y + 1/24 x y + 1/48 x y - 1/144 y
+
+ 4 4 3
+ + 1/24 x y - 1/288 y - 1/48 x y , COEFF(-1, 2) = - 1/12 x y + 1/9 y
+
+ 4 2 4 2 2 2 4 2
+ + 1/24 x y - 1/12 x y - 1/18 y + 1/12 x y + 1/18 y - 1/24 x y
+
+ 2 2 3 3 2
+ + 1/6 y x - 1/6 x y - 1/9 y + 1/12 x y , COEFF(0, 2) = 5/48 y
+
+ 2 2 3 4 2 4 2 3
+ - 1/8 x y - 5/24 y + 5/24 y - 5/48 y + 1/8 x y + 1/4 x y
+
+ 2 4 2
+ - 1/4 y x , COEFF(1, 2) = 1/12 x y + 1/18 y + 1/24 x y - 1/9 y
+
+ 2 2 3 2 2 2 4 2 4
+ + 1/6 y x - 1/6 x y + 1/12 x y - 1/18 y - 1/24 x y - 1/12 x y
+
+ 3 3 4 4 2 2
+ - 1/12 x y + 1/9 y , COEFF(2, 2) = - 1/288 y + 1/48 x y - 1/48 x y
+
+ 2 2 3 2 4
+ + 1/144 y + 1/288 y - 1/48 x y - 1/24 x y - 1/144 y + 1/48 x y
+
+ 2 3 3 2
+ + 1/24 x y + 1/24 x y - 1/24 y x ]
+
+> print_coeffs__lc_of_data(%, "coeffs_dxx->coeff_", "fp",
+> "2d.coeffs/2d.cube.order4.smooth0/coeffs-dxx.compute.c");
+bytes used=268463952, alloc=2817532, time=26.58
+bytes used=269464108, alloc=2817532, time=26.64
+bytes used=270464264, alloc=2817532, time=26.72
+bytes used=271468824, alloc=2817532, time=26.79
+bytes used=272470884, alloc=2817532, time=26.86
+bytes used=273471272, alloc=2817532, time=26.94
+bytes used=274471420, alloc=2817532, time=27.14
+bytes used=275471752, alloc=2817532, time=27.42
+bytes used=276472040, alloc=2817532, time=27.49
+bytes used=277475512, alloc=2817532, time=27.55
+bytes used=278475700, alloc=2817532, time=27.65
+bytes used=279484180, alloc=2817532, time=27.75
+bytes used=280484464, alloc=2817532, time=27.86
+bytes used=281491584, alloc=2817532, time=28.19
+bytes used=282491764, alloc=2817532, time=28.39
+bytes used=283493688, alloc=2817532, time=28.47
+bytes used=284493880, alloc=2817532, time=28.62
+bytes used=285503016, alloc=2817532, time=28.93
+bytes used=286503156, alloc=2817532, time=29.13
+bytes used=287503572, alloc=2817532, time=29.21
+bytes used=288504456, alloc=2817532, time=29.36
+bytes used=289504572, alloc=2817532, time=29.68
+bytes used=290504728, alloc=2817532, time=29.75
+bytes used=291504932, alloc=2817532, time=30.12
+bytes used=292505132, alloc=2817532, time=30.26
+bytes used=293505260, alloc=2817532, time=30.36
+bytes used=294505412, alloc=2817532, time=30.69
+bytes used=295505644, alloc=2817532, time=30.79
+>
+# d^2/dxdy
+> simplify( diff(interp_2d_cube_order4_smooth0,x,y) );
+bytes used=296505980, alloc=2817532, time=30.89
+bytes used=297506132, alloc=2817532, time=30.96
+bytes used=298506352, alloc=2817532, time=31.03
+1/144 DATA(2, 2) - 1/18 DATA(1, 2) + 1/18 DATA(-1, 2) - 1/18 DATA(2, 1)
+
+ + 1/18 DATA(2, -1) + 4/9 DATA(1, 1) - 1/144 DATA(-2, 2) + 1/18 DATA(-2, 1)
+
+ - 1/18 DATA(-2, -1) - 1/144 DATA(2, -2) + 1/18 DATA(1, -2)
+
+ - 1/18 DATA(-1, -2) + 1/144 DATA(-2, -2) + 4/9 DATA(-1, -1)
+
+ 3 3
+ - 4/9 DATA(1, -1) - 4/9 DATA(-1, 1) - 2/3 x y DATA(1, 0)
+
+ 3 3 3 3 3 3
+ + 1/6 x y DATA(-2, 0) - 2/3 x y DATA(-1, 0) + 4/9 x y DATA(-1, 1)
+
+ 3 3 3 3 3 3
+ + x y DATA(0, 0) - 1/9 x y DATA(2, 1) - 1/9 x y DATA(2, -1)
+
+ + 8/9 x DATA(-1, 1) + 5/24 y DATA(2, 0) - 5/3 y DATA(1, 0)
+
+ - 8/9 x DATA(-1, -1) + 5/3 x DATA(0, -1) - 8/9 x DATA(1, -1)
+
+ 3 3
+ + 5/3 y DATA(-1, 0) - 1/72 x DATA(2, 2) + 1/18 x DATA(1, 2)
+
+ 3 3 3
+ + 1/18 x DATA(-1, 2) - 1/12 x DATA(0, 2) + 1/72 x DATA(2, -2)
+
+ 3 3 3
+ - 1/18 x DATA(1, -2) + 1/12 x DATA(0, -2) - 1/18 x DATA(-1, -2)
+
+ 3 3 3
+ + 1/9 x DATA(2, 1) - 1/9 x DATA(2, -1) + 2/3 x DATA(0, 1)
+
+ 3 3
+ - 4/9 x DATA(1, 1) - 1/72 x DATA(-2, 2) - 5/24 y DATA(-2, 0)
+
+ 3 3 3 3 3 3
+ - 2/3 x y DATA(0, 1) + 1/36 x y DATA(-2, 2) - 1/9 x y DATA(-2, 1)
+
+ 3 3 3 3 3 3
+ + 4/9 x y DATA(1, 1) + 1/36 x y DATA(2, -2) - 1/9 x y DATA(1, -2)
+
+ 3 3 3 3 3 3
+ + 1/6 x y DATA(0, -2) - 1/9 x y DATA(-1, -2) + 1/36 x y DATA(-2, -2)
+
+ 2 2 2 2 2
+ + 2/3 x y DATA(-1, -1) + 1/4 x y DATA(1, 1) - 1/16 x y DATA(-2, 2)
+
+ 3 3 3 3 3 3
+ - 1/9 x y DATA(1, 2) - 1/9 x y DATA(-1, 2) + 1/36 x y DATA(2, 2)
+
+ 3 3 3
+ + 4/3 x y DATA(1, 0) - 1/12 x y DATA(-2, 0) + 4/3 x y DATA(-1, 0)
+
+ 3 3 3 3 3
+ - 5/2 x y DATA(0, 0) + 1/6 x y DATA(2, 0) - 1/9 x y DATA(-2, -1)
+
+ 3 3 3
+ + 1/72 x DATA(-2, -2) + 5/3 x y DATA(0, -1) - 5/12 x y DATA(0, 2)
+
+ 3 3 3 3
+ + 5/3 x y DATA(0, 1) - 1/12 x y DATA(2, 0) + 4/9 x y DATA(-1, -1)
+
+ 3 3 3 3
+ - 2/3 x y DATA(0, -1) - 5/12 x y DATA(0, -2) + 4/9 x DATA(-1, -1)
+
+ 2 2 2
+ + 5/4 y x DATA(1, 0) + 5/8 y x DATA(-2, 0) - 5/8 y x DATA(2, 0)
+
+ 2 3 3
+ - 5/4 y x DATA(-1, 0) - 5/2 y x DATA(0, 0) - 5/12 y x DATA(2, 0)
+
+ 3 3 3
+ + 2/9 y x DATA(-2, 1) + 2/9 y x DATA(-2, -1) - 1/72 y x DATA(2, -2)
+
+ 3 3 3
+ - 8/9 y x DATA(1, -1) + 5/3 y x DATA(1, 0) - 5/12 y x DATA(-2, 0)
+
+ 3 3 3
+ + 5/3 y x DATA(-1, 0) - 8/9 y x DATA(-1, 1) + 2/9 y x DATA(2, -1)
+
+ 3 3 3
+ - 1/12 y x DATA(0, 2) + 4/3 y x DATA(0, 1) - 8/9 y x DATA(1, 1)
+
+ 3 3 3
+ - 1/72 y x DATA(-2, 2) - 1/72 y x DATA(-2, -2) - 8/9 y x DATA(-1, -1)
+
+ 3 3 3
+ + 4/3 y x DATA(0, -1) + 1/18 y x DATA(1, 2) + 1/18 y x DATA(-1, 2)
+
+ 3 3 2
+ - 1/72 y x DATA(2, 2) + 2/9 y x DATA(2, 1) - 1/6 x DATA(2, -1)
+
+ 2 2 2
+ - 1/3 x DATA(1, 1) + 1/48 x DATA(-2, 2) - 1/6 x DATA(-2, 1)
+
+ 2 2 2
+ + 1/6 x DATA(-2, -1) + 1/48 x DATA(2, -2) - 1/24 x DATA(1, -2)
+
+ 2 2 2
+ + 1/24 x DATA(-1, -2) - 1/48 x DATA(-2, -2) - 1/3 x DATA(-1, -1)
+
+ 2 2 2
+ + 1/3 x DATA(1, -1) + 1/24 x DATA(1, 2) - 1/24 x DATA(-1, 2)
+
+ 2 2 3
+ + 1/6 x DATA(2, 1) - 1/48 x DATA(2, 2) - 2/3 x DATA(0, -1)
+
+ 3 3 3
+ + 4/9 x DATA(1, -1) - 4/9 x DATA(-1, 1) + 1/9 x DATA(-2, 1)
+
+ 3
+ - 1/9 x DATA(-2, -1) + 5/24 x DATA(0, 2) - 1/18 x DATA(2, 1)
+
+ + 1/18 x DATA(2, -1) - 5/3 x DATA(0, 1) + 8/9 x DATA(1, 1)
+
+ + 1/144 x DATA(-2, 2) - 1/18 x DATA(-2, 1) + 1/18 x DATA(-2, -1)
+
+ - 1/144 x DATA(2, -2) + 1/9 x DATA(1, -2) - 5/24 x DATA(0, -2)
+
+ 2 3 3
+ + 5/4 x y DATA(0, 1) + 1/18 y x DATA(1, -2) - 1/12 y x DATA(0, -2)
+
+ 3 2
+ + 1/18 y x DATA(-1, -2) - 5/8 x y DATA(0, 2) + 1/9 x DATA(-1, -2)
+
+ 3 2 3 2 3 2
+ - 1/2 x y DATA(0, 1) + 1/3 x y DATA(1, 1) + 1/24 x y DATA(-2, 2)
+
+ 3 2 3 2
+ - 1/12 x y DATA(-2, 1) + 1/12 x y DATA(-2, -1)
+
+ 3 2 2 2
+ - 1/24 x y DATA(2, -2) + 5/8 x y DATA(0, -2) - 5/4 x y DATA(0, -1)
+
+ 3 2 3 2
+ - 1/144 x DATA(-2, -2) - 1/4 x y DATA(0, -2) + 1/24 x y DATA(2, 2)
+
+ 3 2 3 2 3 2
+ - 1/6 x y DATA(1, 2) - 1/6 x y DATA(-1, 2) + 1/4 x y DATA(0, 2)
+
+ 3 2 3 2 3 2
+ - 1/12 x y DATA(2, 1) + 1/12 x y DATA(2, -1) - 1/3 x y DATA(1, -1)
+
+ 2
+ + 1/3 x DATA(-1, 1) + 5/24 x y DATA(-2, 0) - 10/3 x y DATA(-1, 0)
+
+ 3 2 3 2 3 2
+ + 1/6 x y DATA(1, -2) + 1/6 x y DATA(-1, -2) - 1/24 x y DATA(-2, -2)
+
+ 3 2 3 2 3 2
+ - 1/3 x y DATA(-1, -1) + 1/2 x y DATA(0, -1) + 1/3 x y DATA(-1, 1)
+
+ + 5/24 x y DATA(2, 0) - 10/3 x y DATA(1, 0) + 1/144 x DATA(2, 2)
+
+ + 25/4 x y DATA(0, 0) + 5/24 x y DATA(0, 2) - 10/3 x y DATA(0, 1)
+
+ 2 3
+ + 5/24 x y DATA(0, -2) + 1/4 x y DATA(2, 0) - 10/3 x y DATA(0, -1)
+
+ 2 3 2 3 3
+ + 1/2 x y DATA(-1, 0) - 1/2 x y DATA(1, 0) - 2/3 y DATA(-1, 0)
+
+ 3 3
+ - 1/9 x DATA(1, 2) - 1/9 x DATA(-1, 2) + 1/6 x y DATA(0, 2)
+
+ 2 3 3 3
+ - 1/4 x y DATA(-2, 0) - 1/12 y DATA(2, 0) + 2/3 y DATA(1, 0)
+
+ 3 3 3 2 2
+ + 1/12 y DATA(-2, 0) + 4/9 x y DATA(1, -1) - 1/16 x y DATA(2, -2)
+
+ 2 2 2 2 2 2
+ + 1/8 x y DATA(1, -2) - 1/8 x y DATA(-1, -2) + 1/16 x y DATA(-2, -2)
+
+ 2 2 2 2 2 2
+ + 1/4 x y DATA(-1, -1) - 1/4 x y DATA(1, -1) - 1/4 x y DATA(-1, 1)
+
+ 2 2 2
+ + 1/24 y x DATA(1, 2) - 1/24 y x DATA(-1, 2) + 1/3 y x DATA(2, 1)
+
+ 2 2 2 2
+ - 1/8 x y DATA(-2, -1) + 1/24 y x DATA(1, -2) - 1/24 y x DATA(-1, -2)
+
+ 2 2 2
+ + 1/48 y x DATA(-2, -2) - 1/48 y x DATA(2, 2) - 2/3 y x DATA(1, 1)
+
+ 2 2 2
+ + 1/48 y x DATA(-2, 2) - 1/3 y x DATA(-2, 1) - 1/3 y x DATA(-2, -1)
+
+ 2 2 2
+ - 1/48 y x DATA(2, -2) + 2/3 y x DATA(-1, -1) - 2/3 y x DATA(1, -1)
+
+ 2 2 2
+ + 2/3 y x DATA(-1, 1) + 1/3 y x DATA(2, -1) + 2/3 x y DATA(1, -1)
+
+ 2 2 2
+ - 2/3 x y DATA(-1, 1) - 1/24 x y DATA(-2, -1) + 1/48 x y DATA(2, -2)
+
+ 2 2 2
+ - 1/3 x y DATA(1, -2) - 1/3 x y DATA(-1, -2) + 1/3 x y DATA(1, 2)
+
+ 2 2 2
+ + 1/3 x y DATA(-1, 2) + 1/24 x y DATA(2, 1) + 1/48 x y DATA(-2, -2)
+
+ - 1/9 x y DATA(1, 2) - 1/9 x y DATA(-1, 2) - 1/9 x y DATA(2, 1)
+
+ - 1/9 x y DATA(2, -1) + 16/9 x y DATA(1, 1) + 1/144 x y DATA(-2, 2)
+
+ - 1/9 x y DATA(-2, 1) - 1/9 x y DATA(-2, -1) + 1/144 x y DATA(2, -2)
+
+ 2 2 2
+ - 2/3 x y DATA(1, 1) + 1/24 x y DATA(-2, 1) - 1/48 x y DATA(-2, 2)
+
+ 2 2
+ - 1/24 x y DATA(2, -1) - 1/48 x y DATA(2, 2) + 16/9 x y DATA(-1, 1)
+
+ + 1/144 x y DATA(2, 2) - 1/9 x y DATA(1, -2) - 1/9 x y DATA(-1, -2)
+
+ + 1/144 x y DATA(-2, -2) + 16/9 x y DATA(-1, -1) + 16/9 x y DATA(1, -1)
+
+ 3 3 3
+ - 1/72 x y DATA(2, 2) + 1/18 x y DATA(2, -1) - 8/9 x y DATA(1, 1)
+
+ 3 3 3
+ - 1/72 x y DATA(-2, 2) + 1/18 x y DATA(-2, 1) - 8/9 x y DATA(-1, 1)
+
+ 3 3 3
+ + 2/9 x y DATA(1, 2) + 2/9 x y DATA(-1, 2) + 1/18 x y DATA(2, 1)
+
+ 3 3 3
+ + 1/18 x y DATA(-2, -1) - 1/72 x y DATA(2, -2) + 2/9 x y DATA(1, -2)
+
+ 3 3 3
+ + 2/9 x y DATA(-1, -2) - 1/72 x y DATA(-2, -2) - 8/9 x y DATA(-1, -1)
+
+ 3 2 3 2 3
+ - 8/9 x y DATA(1, -1) + 1/6 x y DATA(-2, 1) - 1/24 x y DATA(-2, -2)
+
+ 2 3 2 3 2 3
+ + 1/24 x y DATA(2, -2) - 1/12 x y DATA(1, -2) - 1/6 x y DATA(2, -1)
+
+ 2 3 2 3 2 3
+ + 1/6 x y DATA(-2, -1) + 1/3 x y DATA(1, 1) - 1/24 x y DATA(-2, 2)
+
+ 2 3 2 3 2 3
+ + 1/24 x y DATA(2, 2) - 1/12 x y DATA(1, 2) + 1/12 x y DATA(-1, 2)
+
+ 2 3 2 2 2 2
+ - 1/6 x y DATA(2, 1) + 1/8 x y DATA(-2, 1) - 1/8 x y DATA(1, 2)
+
+ 2 2 2 2 2 2
+ + 1/8 x y DATA(-1, 2) - 1/8 x y DATA(2, 1) + 1/8 x y DATA(2, -1)
+
+ 2 2 2 3 2 3
+ + 1/16 x y DATA(2, 2) + 1/12 x y DATA(-1, -2) - 1/3 x y DATA(-1, -1)
+
+ 2 3 2 3 3
+ + 1/3 x y DATA(1, -1) - 1/3 x y DATA(-1, 1) - 1/9 y DATA(-1, -2)
+
+ 3 3
+ - 1/9 y DATA(-1, 2) - 1/72 y DATA(2, 2) + 1/9 y DATA(-2, 1)
+
+ 3
+ + 1/9 y DATA(-2, -1) + 1/144 y DATA(2, -2) - 4/9 y DATA(1, -1)
+
+ 3 3 3
+ + 4/9 y DATA(-1, 1) + 4/9 y DATA(-1, -1) + 1/9 y DATA(1, 2)
+
+ 3 3 3
+ + 1/18 y DATA(2, 1) + 1/18 y DATA(2, -1) - 4/9 y DATA(1, 1)
+
+ 3 3 3
+ + 1/72 y DATA(-2, 2) - 1/18 y DATA(-2, 1) - 1/18 y DATA(-2, -1)
+
+ 3 3 2
+ - 1/72 y DATA(2, -2) + 1/9 y DATA(1, -2) + 1/6 y DATA(1, 2)
+
+ 2 2 2
+ - 1/6 y DATA(-1, 2) - 1/48 y DATA(-2, -2) + 1/3 y DATA(1, -1)
+
+ 2 2 2
+ + 1/3 y DATA(-1, 1) - 1/3 y DATA(-1, -1) + 1/48 y DATA(-2, 2)
+
+ 2 2 2
+ - 1/24 y DATA(-2, 1) - 1/3 y DATA(1, 1) + 1/24 y DATA(-2, -1)
+
+ 2 2
+ + 1/48 y DATA(2, -2) - 1/48 y DATA(2, 2) + 1/144 y DATA(2, 2)
+
+ 2 2
+ + 1/24 y DATA(2, 1) - 1/24 y DATA(2, -1) - 1/18 y DATA(1, 2)
+
+ + 1/18 y DATA(-1, 2) - 1/9 y DATA(2, 1) - 1/9 y DATA(2, -1)
+
+ 2
+ + 8/9 y DATA(1, 1) - 1/144 y DATA(-2, 2) - 1/6 y DATA(1, -2)
+
+ 2
+ + 1/6 y DATA(-1, -2) - 1/18 y DATA(1, -2) + 1/18 y DATA(-1, -2)
+
+ - 1/144 y DATA(-2, -2) - 8/9 y DATA(-1, -1) + 8/9 y DATA(1, -1)
+
+ 3
+ - 8/9 y DATA(-1, 1) + 1/72 y DATA(-2, -2)
+
+> coeffs_as_lc_of_data(%, posn_list_2d_size5);
+bytes used=299534960, alloc=2817532, time=31.10
+bytes used=300538760, alloc=2817532, time=31.17
+ 3 3 2 2 2 3
+[COEFF(-2, -2) = 1/36 x y - 1/144 y + 1/16 x y + 1/144 x y - 1/24 x y
+
+ 2 2 3 2 3 3
+ + 1/48 x y + 1/48 y x - 1/24 x y + 1/72 y + 1/72 x - 1/144 x
+
+ 2 3 3 2
+ - 1/48 y - 1/72 x y + 1/144 - 1/72 y x - 1/48 x , COEFF(-1, -2) =
+
+ 2 3 2 2 3 3
+ 1/24 x + 1/9 x + 1/6 x y + 1/18 y + 1/12 x y - 1/18 + 2/9 x y
+
+ 2 2 2 2 3 3 3
+ - 1/24 y x - 1/9 x y - 1/8 x y - 1/3 x y - 1/9 y - 1/9 x y
+
+ 3 2 3 2 3
+ - 1/18 x + 1/6 y + 1/18 y x , COEFF(0, -2) = 5/8 x y - 1/12 y x
+
+ 3 3 3 3 2 3
+ - 5/12 x y + 5/24 x y + 1/6 x y - 5/24 x - 1/4 x y + 1/12 x ,
+
+ 2 3 2 2
+ COEFF(1, -2) = - 1/3 x y + 1/6 x y - 1/6 y - 1/18 y + 1/9 x
+
+ 2 3 2 3 3 3 2 2
+ - 1/12 x y + 1/24 y x + 1/18 + 1/18 y x + 1/9 y - 1/18 x + 1/8 x y
+
+ 3 3 2 3 2 2
+ - 1/9 x y - 1/24 x - 1/9 x y + 2/9 x y , COEFF(2, -2) = - 1/16 x y
+
+ 3 2 3 2 2
+ - 1/72 x y + 1/48 x y + 1/144 x y - 1/24 x y - 1/48 y x - 1/144 x
+
+ 3 2 3 2 3 3 3
+ - 1/72 y x + 1/24 x y + 1/48 y - 1/144 - 1/72 y + 1/36 x y
+
+ 3 2 3 3 3
+ + 1/72 x + 1/144 y + 1/48 x , COEFF(-2, -1) = - 1/18 - 1/9 x y - 1/9 x
+
+ 3 2 3 2 3 2 3
+ - 1/18 y + 1/6 x y + 1/6 x + 1/12 x y - 1/9 x y + 2/9 y x + 1/9 y
+
+ 2 2 3 2 2 2
+ - 1/8 x y + 1/18 x y + 1/24 y - 1/24 x y + 1/18 x - 1/3 y x ,
+
+ 3 3 3 2 3
+ COEFF(-1, -1) = 4/9 x y - 8/9 y x + 16/9 x y + 4/9 - 1/3 x - 8/9 x y
+
+ 3 2 2 3 2 2
+ - 1/3 x y - 8/9 x + 2/3 x y + 4/9 x - 8/9 y + 2/3 y x - 1/3 y
+
+ 2 3 3 2 2 3 3 3
+ - 1/3 x y + 4/9 y + 1/4 x y , COEFF(0, -1) = - 2/3 x y + 4/3 y x
+
+ 3 3 2 2 3
+ + 5/3 x y + 1/2 x y + 5/3 x - 5/4 x y - 10/3 x y - 2/3 x ,
+
+ 3 3 3 3 3 3
+ COEFF(1, -1) = - 4/9 y - 8/9 x y + 4/9 x - 8/9 x + 4/9 x y - 8/9 y x
+
+ 2 3 2 2 3 2 2 2
+ + 1/3 x y + 16/9 x y - 1/4 x y - 1/3 x y + 1/3 y + 1/3 x + 8/9 y
+
+ 2 2 2 3 2
+ - 2/3 y x - 4/9 + 2/3 x y , COEFF(2, -1) = 1/3 y x + 1/12 x y
+
+ 3 3 2 2 3 3
+ + 2/9 y x + 1/18 y - 1/6 x - 1/9 x y + 1/18 x - 1/24 y - 1/9 x y
+
+ 2 2 2 3 2 3 3
+ + 1/18 + 1/8 x y - 1/9 y - 1/6 x y - 1/24 x y + 1/18 x y - 1/9 x ,
+
+ 3 3 3 3 2 3
+ COEFF(-2, 0) = 1/6 x y - 5/24 y - 5/12 y x - 1/12 x y - 1/4 x y
+
+ 2 3 2 2 3
+ + 5/24 x y + 5/8 y x + 1/12 y , COEFF(-1, 0) = - 5/4 y x + 1/2 x y
+
+ 3 3 3 3 3
+ + 4/3 x y + 5/3 y x - 10/3 x y - 2/3 y - 2/3 x y + 5/3 y,
+
+ 3 3 3 3
+ COEFF(0, 0) = 25/4 x y - 5/2 y x - 5/2 x y + x y , COEFF(1, 0) =
+
+ 2 3 2 3 3 3 3
+ - 1/2 x y + 5/4 y x - 5/3 y - 2/3 x y + 5/3 y x + 2/3 y - 10/3 x y
+
+ 3 3 3 2 3
+ + 4/3 x y , COEFF(2, 0) = 5/24 y + 1/6 x y + 5/24 x y + 1/4 x y
+
+ 2 3 3 3 2
+ - 5/8 y x - 5/12 y x - 1/12 y - 1/12 x y , COEFF(-2, 1) = 1/24 x y
+
+ 2 3 2 2 3 2 3 3
+ - 1/3 y x + 2/9 y x + 1/8 x y - 1/12 x y + 1/18 x y - 1/18 y
+
+ 2 2 3 2 3 3
+ - 1/9 x y - 1/6 x + 1/18 + 1/6 x y - 1/24 y - 1/9 x y + 1/9 y
+
+ 3 2 2
+ + 1/9 x - 1/18 x, COEFF(-1, 1) = 2/3 y x - 4/9 - 8/9 y - 2/3 x y
+
+ 3 2 3 3 3 3 3 2
+ - 8/9 x y + 1/3 x + 4/9 y + 16/9 x y - 4/9 x + 4/9 x y + 1/3 x y
+
+ 3 2 2 3 2 2
+ - 8/9 y x + 8/9 x + 1/3 y - 1/3 x y - 1/4 x y , COEFF(0, 1) =
+
+ 3 3 2 3 3 3 3
+ 4/3 y x - 1/2 x y + 5/3 x y - 2/3 x y - 10/3 x y - 5/3 x + 2/3 x
+
+ 2 3 2 3 2 2 3
+ + 5/4 x y , COEFF(1, 1) = - 4/9 x + 1/3 x y + 1/4 x y - 4/9 y
+
+ 2 2 3 2 3
+ - 1/3 y + 8/9 y - 1/3 x - 8/9 x y - 2/3 x y - 8/9 y x + 8/9 x
+
+ 2 3 2 3 3
+ - 2/3 y x + 1/3 x y + 4/9 x y + 16/9 x y + 4/9, COEFF(2, 1) = - 1/18
+
+ 3 2 3 2 3 2 2
+ + 1/9 x - 1/18 x + 1/24 y - 1/12 x y + 2/9 y x + 1/6 x + 1/24 x y
+
+ 2 3 3 2 2 3 3 3
+ - 1/6 x y + 1/18 x y - 1/9 y - 1/8 x y - 1/9 x y + 1/18 y
+
+ 2 2 2 2
+ - 1/9 x y + 1/3 y x , COEFF(-2, 2) = - 1/48 x y + 1/48 x + 1/48 y x
+
+ 2 2 2 2 3
+ - 1/144 + 1/144 x y + 1/48 y - 1/16 x y - 1/24 x y + 1/144 x
+
+ 3 3 3 3 3 3 2
+ - 1/72 x y - 1/144 y - 1/72 x - 1/72 y x + 1/36 x y + 1/24 x y
+
+ 3 2 3 3 2
+ + 1/72 y , COEFF(-1, 2) = 1/3 x y - 1/9 y + 1/18 x - 1/24 y x + 1/18
+
+ 2 2 3 2 2 3 2 3 3
+ - 1/24 x + 1/12 x y + 1/8 x y + 2/9 x y - 1/6 y - 1/9 x y
+
+ 3 2 3
+ - 1/6 x y - 1/9 x y + 1/18 y - 1/9 x + 1/18 y x , COEFF(0, 2) = 5/24 x
+
+ 2 3 2 3 3 3 3
+ - 5/8 x y + 5/24 x y + 1/4 x y + 1/6 x y - 5/12 x y - 1/12 y x
+
+ 3 2 3 2 3 3
+ - 1/12 x , COEFF(1, 2) = - 1/12 x y - 1/18 + 1/24 x + 1/18 x + 1/9 y
+
+ 2 3 2 3 2 2
+ + 1/6 y + 2/9 x y + 1/24 y x - 1/18 y + 1/18 y x - 1/8 x y - 1/9 x y
+
+ 3 2 3 3 2 3
+ - 1/6 x y - 1/9 x y + 1/3 x y - 1/9 x, COEFF(2, 2) = - 1/72 y x
+
+ 3 2 2 2 3
+ - 1/72 x - 1/48 x + 1/144 x y + 1/144 - 1/48 y + 1/144 x + 1/24 x y
+
+ 2 3 2 2 2 3 2 3
+ - 1/48 y x - 1/72 x y + 1/16 x y - 1/48 x y + 1/24 x y - 1/72 y
+
+ 3 3
+ + 1/36 x y + 1/144 y]
+
+> print_coeffs__lc_of_data(%, "coeffs_dxy->coeff_", "fp",
+> "2d.coeffs/2d.cube.order4.smooth0/coeffs-dxy.compute.c");
+bytes used=301539208, alloc=2817532, time=31.25
+bytes used=302539400, alloc=2817532, time=31.32
+bytes used=303539592, alloc=2817532, time=31.40
+bytes used=304557648, alloc=2817532, time=31.44
+bytes used=305571464, alloc=2817532, time=31.54
+bytes used=306581776, alloc=2817532, time=31.63
+bytes used=307582028, alloc=2817532, time=31.71
+bytes used=308582248, alloc=2817532, time=31.78
+bytes used=309582476, alloc=2817532, time=32.18
+bytes used=310582696, alloc=2817532, time=32.25
+bytes used=311582884, alloc=2817532, time=32.32
+bytes used=312583056, alloc=2817532, time=32.42
+bytes used=313583260, alloc=2817532, time=32.51
+bytes used=314583428, alloc=2817532, time=32.60
+bytes used=315583596, alloc=2817532, time=32.70
+bytes used=316593332, alloc=2817532, time=33.09
+bytes used=317593536, alloc=2817532, time=33.32
+bytes used=318593748, alloc=2817532, time=33.39
+bytes used=319593964, alloc=2817532, time=33.51
+bytes used=320594120, alloc=2817532, time=33.69
+bytes used=321594408, alloc=2817532, time=34.06
+bytes used=322594856, alloc=2817532, time=34.26
+bytes used=323595080, alloc=2817532, time=34.33
+bytes used=324595308, alloc=2817532, time=34.46
+bytes used=325595460, alloc=2817532, time=34.65
+bytes used=326595828, alloc=2817532, time=35.02
+bytes used=327596080, alloc=2817532, time=35.09
+bytes used=328596388, alloc=2817532, time=35.22
+bytes used=329596548, alloc=2817532, time=35.63
+bytes used=330596860, alloc=2817532, time=35.76
+bytes used=331597036, alloc=2817532, time=35.86
+bytes used=332597196, alloc=2817532, time=36.29
+bytes used=333597480, alloc=2817532, time=36.41
+>
+# d^2/dy^2
+> simplify( diff(interp_2d_cube_order4_smooth0,y,y) );
+bytes used=334597656, alloc=2817532, time=36.56
+bytes used=335597820, alloc=2817532, time=36.64
+bytes used=336597976, alloc=2817532, time=36.70
+- 1/12 DATA(0, 2) - 5/2 DATA(0, 0) + 4/3 DATA(0, 1) - 1/12 DATA(0, -2)
+
+ 3 4 4
+ + 5/12 x DATA(1, 0) - 5/8 x DATA(0, 0) + 5/12 x DATA(-1, 0)
+
+ 4 4 4
+ - 5/48 x DATA(2, 0) + 5/12 x DATA(1, 0) + 1/72 x DATA(1, 2)
+
+ 4 4 4
+ + 1/72 x DATA(-1, 2) + 1/18 x DATA(2, 1) - 1/48 x DATA(0, 2)
+
+ 3 3
+ - 5/12 x DATA(-1, 0) + 5/24 x DATA(-2, 0) + 1/2 y DATA(0, 2)
+
+ 4 4 4
+ + 1/3 x DATA(0, -1) - 1/48 x DATA(0, -2) + 1/3 x DATA(0, 1)
+
+ 4 4 4
+ + 1/72 x DATA(1, -2) - 1/288 x DATA(2, -2) + 1/18 x DATA(-2, -1)
+
+ 4 3 2 4
+ - 5/48 x DATA(-2, 0) - 5/24 x DATA(2, 0) - 1/2 y x DATA(0, -1)
+
+ 2 4 2 4 2 4
+ - 1/2 y x DATA(0, 1) + 1/8 y x DATA(0, -2) + 1/48 y x DATA(2, -2)
+
+ 2 4 2 4 2 4
+ - 1/12 y x DATA(-2, -1) + 1/8 y x DATA(-2, 0) - 1/12 y x DATA(1, -2)
+
+ 3 2 3 2
+ + 1/4 x y DATA(2, 0) + 5/24 x DATA(2, 0) - 1/2 x y DATA(1, 0)
+
+ 3 2 2 2 2 2
+ + 1/2 x y DATA(-1, 0) - 5/8 x y DATA(0, 2) - 5/8 x y DATA(0, -2)
+
+ 2 2 2 2 2 2
+ - 15/4 x y DATA(0, 0) + 5/2 x y DATA(0, 1) - 1/8 x y DATA(-2, 0)
+
+ 2 2 2 4 2 4
+ + 5/2 x y DATA(0, -1) + 1/3 y x DATA(-1, -1) - 1/12 y x DATA(-1, -2)
+
+ 2 4 2 4 2 4
+ + 1/3 y x DATA(-1, 1) + 1/48 y x DATA(-2, -2) - 1/2 y x DATA(-1, 0)
+
+ 2 4 2 4 2 4
+ + 1/3 y x DATA(1, -1) + 1/3 y x DATA(1, 1) - 1/2 y x DATA(1, 0)
+
+ 2 4 2 4 2 4
+ + 1/8 y x DATA(2, 0) - 1/12 y x DATA(-2, 1) + 1/48 y x DATA(-2, 2)
+
+ 2 2 4 2 4
+ - 2 x y DATA(-1, 0) + 1/48 y x DATA(2, 2) - 1/12 y x DATA(2, -1)
+
+ 2 2 2 2 2 2
+ + 2 x y DATA(-1, 0) + 2 x y DATA(1, 0) - 1/8 x y DATA(2, 0)
+
+ 2
+ - 5/3 x DATA(1, 0) + 4/3 DATA(0, -1) + 2 x y DATA(1, 0)
+
+ 2 2 4
+ + 1/4 x y DATA(-2, 0) - 1/4 x y DATA(2, 0) - 2/9 x DATA(-1, -1)
+
+ 2 4 4
+ - 5/4 y x DATA(0, -1) - 1/288 x DATA(2, 2) + 1/72 x DATA(-1, -2)
+
+ 4 4 4
+ - 2/9 x DATA(1, -1) - 2/9 x DATA(-1, 1) - 2/9 x DATA(1, 1)
+
+ 4 4 2
+ - 1/288 x DATA(-2, 2) - 1/288 x DATA(-2, -2) + 5/8 y x DATA(0, -2)
+
+ 2
+ + 5/4 y x DATA(0, 1) - 1/2 y DATA(0, -2) - y DATA(0, 1)
+
+ 2 2
+ - 5/8 y x DATA(0, 2) + y DATA(0, -1) + 1/2 y DATA(0, 2)
+
+ 2 2 2
+ + 1/2 y DATA(0, -2) - 2 y DATA(0, 1) - 2 y DATA(0, -1)
+
+ 4 4 4
+ + 1/6 y x DATA(-1, 1) + 1/12 y x DATA(-1, -2) - 1/8 y x DATA(0, -2)
+
+ 2 2 2
+ + 3 y DATA(0, 0) - 5/3 x DATA(1, 0) + 5/48 x DATA(0, 2)
+
+ 2 2 2
+ - 5/3 x DATA(0, -1) + 5/48 x DATA(0, -2) - 5/3 x DATA(0, 1)
+
+ 2 4 4
+ + 25/8 x DATA(0, 0) - 1/6 y x DATA(-1, -1) - 1/48 y x DATA(-2, -2)
+
+ 2 4 4
+ + 5/48 x DATA(-2, 0) + 1/48 y x DATA(-2, 2) + 1/6 y x DATA(1, 1)
+
+ 4 4 4
+ + 1/4 y x DATA(0, -1) + 1/24 y x DATA(-2, -1) + 1/12 y x DATA(1, -2)
+
+ 2 2 4
+ - 5/3 x DATA(-1, 0) + 5/48 x DATA(2, 0) - 1/48 y x DATA(2, -2)
+
+ 4 3 2
+ - 1/24 y x DATA(-2, 1) - 1/4 x y DATA(-2, 0) - 5/24 x DATA(-2, 0)
+
+ 4 4 4
+ + 1/48 y x DATA(2, 2) + 1/18 x DATA(-2, 1) + 1/18 x DATA(2, -1)
+
+ 4 4 4
+ - 1/24 y x DATA(2, 1) + 1/8 y x DATA(0, 2) - 1/4 y x DATA(0, 1)
+
+ 4 4 2 4
+ + 1/24 y x DATA(2, -1) - 1/6 y x DATA(1, -1) - 1/12 y x DATA(-1, 2)
+
+ 2 4 2 4
+ - 1/12 y x DATA(1, 2) + 5/3 x DATA(-1, 0) + 3/4 y x DATA(0, 0)
+
+ 2 4 2 4 4
+ + 1/8 y x DATA(0, 2) - 1/12 y x DATA(2, 1) - 1/12 y x DATA(-1, 2)
+
+ 4
+ - 1/12 y x DATA(1, 2) - 8/9 x DATA(-1, 1) - 8/9 x DATA(-1, -1)
+
+ 3 3
+ + 8/9 x DATA(1, -1) - 1/144 x DATA(2, 2) + 1/72 x DATA(1, 2)
+
+ 3 3 3
+ - 1/72 x DATA(-1, 2) - 1/144 x DATA(2, -2) + 1/72 x DATA(1, -2)
+
+ 3 3 3
+ - 1/72 x DATA(-1, -2) + 1/9 x DATA(2, 1) + 1/9 x DATA(2, -1)
+
+ 3 3 2
+ - 2/9 x DATA(1, 1) + 1/144 x DATA(-2, 2) + 4/3 x y DATA(-1, -1)
+
+ 2 2 2 2 3
+ - 4/3 x y DATA(1, 1) - 1/48 x y DATA(-2, 2) + 1/144 x DATA(-2, -2)
+
+ 3 3 3
+ + 2/9 x DATA(-1, -1) + 1/12 y x DATA(-2, 1) - 1/12 y x DATA(-2, -1)
+
+ 3 3 3
+ - 1/24 y x DATA(2, -2) - 1/6 y x DATA(1, -1) - 1/6 y x DATA(-1, 1)
+
+ 3 3 3
+ + 1/12 y x DATA(2, -1) + 1/6 y x DATA(1, 1) - 1/24 y x DATA(-2, 2)
+
+ 3 3 3
+ + 1/24 y x DATA(-2, -2) + 1/6 y x DATA(-1, -1) - 1/12 y x DATA(1, 2)
+
+ 3 3 3
+ + 1/12 y x DATA(-1, 2) + 1/24 y x DATA(2, 2) - 1/12 y x DATA(2, 1)
+
+ 2 2 2
+ - 1/18 x DATA(2, -1) + 8/9 x DATA(1, 1) + 1/288 x DATA(-2, 2)
+
+ 2 2 2
+ - 1/18 x DATA(-2, 1) - 1/18 x DATA(-2, -1) + 1/288 x DATA(2, -2)
+
+ 2 2 2
+ - 1/18 x DATA(1, -2) - 1/18 x DATA(-1, -2) + 1/288 x DATA(-2, -2)
+
+ 2 2 2
+ + 8/9 x DATA(-1, -1) + 8/9 x DATA(1, -1) - 1/18 x DATA(1, 2)
+
+ 2 2 2
+ - 1/18 x DATA(-1, 2) - 1/18 x DATA(2, 1) + 1/288 x DATA(2, 2)
+
+ 3 3 3
+ - 2/9 x DATA(1, -1) + 2/9 x DATA(-1, 1) - 1/9 x DATA(-2, 1)
+
+ 3
+ - 1/9 x DATA(-2, -1) - 1/9 x DATA(2, 1) - 1/9 x DATA(2, -1)
+
+ + 8/9 x DATA(1, 1) - 1/144 x DATA(-2, 2) + 1/9 x DATA(-2, 1)
+
+ + 1/9 x DATA(-2, -1) + 1/144 x DATA(2, -2) - 1/18 x DATA(1, -2)
+
+ 3 3
+ + 1/12 y x DATA(1, -2) - 1/12 y x DATA(-1, -2) + 1/18 x DATA(-1, -2)
+
+ 3 2 3 2 3 2
+ + 1/3 x y DATA(1, 1) - 1/24 x y DATA(-2, 2) + 1/6 x y DATA(-2, 1)
+
+ 3 2 3 2
+ + 1/6 x y DATA(-2, -1) + 1/24 x y DATA(2, -2) - 1/144 x DATA(-2, -2)
+
+ 3 2 3 2 3 2
+ + 1/24 x y DATA(2, 2) - 1/12 x y DATA(1, 2) + 1/12 x y DATA(-1, 2)
+
+ 3 2 3 2 3 2
+ - 1/6 x y DATA(2, 1) - 1/6 x y DATA(2, -1) + 1/3 x y DATA(1, -1)
+
+ 2 3 2 3 2
+ + 8/9 x DATA(-1, 1) - 1/12 x y DATA(1, -2) + 1/12 x y DATA(-1, -2)
+
+ 3 2 3 2 3 2
+ - 1/24 x y DATA(-2, -2) - 1/3 x y DATA(-1, -1) - 1/3 x y DATA(-1, 1)
+
+ + 1/144 x DATA(2, 2) - 1/18 x DATA(1, 2) + 1/18 x DATA(-1, 2)
+
+ 2 2 2 2 2 2
+ - 1/48 x y DATA(2, -2) + 1/3 x y DATA(1, -2) + 1/3 x y DATA(-1, -2)
+
+ 2 2 2 2 2 2
+ - 1/48 x y DATA(-2, -2) - 4/3 x y DATA(-1, -1) - 4/3 x y DATA(1, -1)
+
+ 2 2 2 2
+ - 4/3 x y DATA(-1, 1) + 1/3 y x DATA(1, 2) + 1/3 y x DATA(-1, 2)
+
+ 2 2 2 2
+ + 1/24 y x DATA(2, 1) + 1/12 x y DATA(-2, -1) - 1/3 y x DATA(1, -2)
+
+ 2 2 2
+ - 1/3 y x DATA(-1, -2) + 1/48 y x DATA(-2, -2) - 1/48 y x DATA(2, 2)
+
+ 2 2 2
+ - 2/3 y x DATA(1, 1) - 1/48 y x DATA(-2, 2) + 1/24 y x DATA(-2, 1)
+
+ 2 2 2
+ - 1/24 y x DATA(-2, -1) + 1/48 y x DATA(2, -2) + 2/3 y x DATA(-1, -1)
+
+ 2 2 2
+ + 2/3 y x DATA(1, -1) - 2/3 y x DATA(-1, 1) - 1/24 y x DATA(2, -1)
+
+ 2 2 2
+ - 4/3 x y DATA(1, -1) + 4/3 x y DATA(-1, 1) - 1/6 x y DATA(-2, -1)
+
+ 2 2 2
+ - 1/24 x y DATA(2, -2) + 1/3 x y DATA(1, -2) - 1/3 x y DATA(-1, -2)
+
+ 2 2 2
+ + 1/3 x y DATA(1, 2) - 1/3 x y DATA(-1, 2) + 1/6 x y DATA(2, 1)
+
+ 2
+ + 1/24 x y DATA(-2, -2) + 1/3 x y DATA(1, 2) - 1/3 x y DATA(-1, 2)
+
+ + 1/12 x y DATA(2, 1) - 1/12 x y DATA(2, -1) - 2/3 x y DATA(1, 1)
+
+ + 1/24 x y DATA(-2, 2) - 1/12 x y DATA(-2, 1) + 1/12 x y DATA(-2, -1)
+
+ 2 2
+ + 1/24 x y DATA(2, -2) - 4/3 x y DATA(1, 1) - 1/6 x y DATA(-2, 1)
+
+ 2 2 2
+ + 1/24 x y DATA(-2, 2) + 1/6 x y DATA(2, -1) - 1/24 x y DATA(2, 2)
+
+ + 2/3 x y DATA(-1, 1) - 1/24 x y DATA(2, 2) - 1/3 x y DATA(1, -2)
+
+ + 1/3 x y DATA(-1, -2) - 1/24 x y DATA(-2, -2) - 2/3 x y DATA(-1, -1)
+
+ 2 2 2 2
+ + 2/3 x y DATA(1, -1) + 1/12 x y DATA(-2, 1) + 1/3 x y DATA(1, 2)
+
+ 2 2 2 2 2 2
+ + 1/3 x y DATA(-1, 2) + 1/12 x y DATA(2, 1) + 1/12 x y DATA(2, -1)
+
+ 2 2
+ - 1/48 x y DATA(2, 2)
+
+> coeffs_as_lc_of_data(%, posn_list_2d_size5);
+bytes used=337598236, alloc=2817532, time=36.76
+bytes used=338598536, alloc=2817532, time=36.83
+ 3 2 2 4
+[COEFF(-2, -2) = 1/144 x - 1/48 x y - 1/24 x y - 1/144 x - 1/48 y x
+
+ 2 2 3 2 2 2 4 3
+ + 1/48 y x + 1/288 x - 1/24 x y + 1/24 x y + 1/48 y x + 1/24 y x
+
+ 4 3 2 4 2 2
+ - 1/288 x , COEFF(-1, -2) = - 1/72 x - 1/3 y x + 1/72 x + 1/3 x y
+
+ 3 2 2 3 2 2 4
+ - 1/12 y x - 1/18 x + 1/3 x y - 1/3 x y + 1/12 x y - 1/12 y x
+
+ 4 2 2 4 4
+ + 1/18 x + 1/12 y x , COEFF(0, -2) = 5/8 y x + 1/8 y x - 1/8 y x
+
+ 4 2 2 2 2
+ - 1/48 x + 5/48 x + 1/2 y - 5/8 x y - 1/12 - 1/2 y, COEFF(1, -2) =
+
+ 2 4 2 2 3 3
+ - 1/18 x + 1/72 x + 1/3 x y - 1/3 x y + 1/12 y x - 1/18 x + 1/72 x
+
+ 2 4 2 3 2 2 4
+ - 1/12 y x - 1/3 y x - 1/12 x y + 1/3 x y + 1/12 y x , COEFF(2, -2)
+
+ 2 4 2 2 2
+ = - 1/24 x y - 1/48 y x + 1/288 x + 1/144 x - 1/48 x y + 1/24 x y
+
+ 3 3 2 3 2 2 4 4
+ - 1/144 x - 1/24 y x + 1/48 y x + 1/24 x y + 1/48 y x - 1/288 x ,
+
+ 4 3 2 2 2
+ COEFF(-2, -1) = 1/12 x y + 1/18 x - 1/9 x + 1/12 x y - 1/24 y x
+
+ 4 2 4 2 3 3 2
+ + 1/24 y x - 1/12 y x - 1/18 x - 1/12 y x + 1/6 x y + 1/9 x
+
+ 2 4 3 2 2 2
+ - 1/6 x y , COEFF(-1, -1) = - 2/9 x - 1/3 x y + 8/9 x + 2/3 y x
+
+ 4 2 4 3 3 2 2 2
+ - 1/6 y x + 1/3 y x + 1/6 y x + 2/9 x - 4/3 x y - 8/9 x + 4/3 x y
+
+ 2 4 2 2 2
+ - 2/3 x y, COEFF(0, -1) = 4/3 - 1/2 y x + y - 5/3 x - 5/4 y x - 2 y
+
+ 4 4 2 2 4 4
+ + 1/4 y x + 1/3 x + 5/2 x y , COEFF(1, -1) = 8/9 x - 1/6 y x - 2/9 x
+
+ 2 4 2 2 3 2 3
+ + 1/3 y x - 4/3 x y + 2/3 y x + 1/3 x y - 2/9 x + 2/3 x y
+
+ 2 2 2 3 3 2
+ - 4/3 x y + 8/9 x - 1/6 y x , COEFF(2, -1) = 1/9 x + 1/6 x y - 1/9 x
+
+ 2 3 4 2 2 3 2
+ - 1/18 x + 1/12 y x + 1/24 y x + 1/12 x y - 1/6 x y - 1/12 x y
+
+ 4 2 4 2 2 2 3 2
+ + 1/18 x - 1/12 y x - 1/24 y x , COEFF(-2, 0) = - 1/8 x y - 1/4 x y
+
+ 3 2 4 2 4 2
+ + 5/24 x + 1/8 y x + 1/4 x y - 5/48 x - 5/24 x + 5/48 x ,
+
+ 3 2 2 2 2 4 2 4
+ COEFF(-1, 0) = 1/2 x y + 2 x y + 5/3 x - 5/3 x + 5/12 x - 1/2 y x
+
+ 3 2
+ - 5/12 x - 2 x y ,
+
+ 2 2 4 2 4 2 2
+ COEFF(0, 0) = 25/8 x - 5/2 + 3 y - 5/8 x + 3/4 y x - 15/4 x y ,
+
+ 2 4 2 2 2 2 3 2 3
+ COEFF(1, 0) = - 1/2 y x + 2 x y + 2 x y - 5/3 x - 1/2 x y + 5/12 x
+
+ 4 4 3 2 2 4
+ + 5/12 x - 5/3 x, COEFF(2, 0) = - 5/48 x + 1/4 x y + 1/8 y x
+
+ 2 2 2 2 3
+ - 1/8 x y - 1/4 x y + 5/48 x - 5/24 x + 5/24 x, COEFF(-2, 1) =
+
+ 3 2 2 4 3
+ - 1/9 x + 1/12 x y - 1/12 x y + 1/9 x - 1/24 y x + 1/12 y x
+
+ 2 2 2 4 2 4 3 2
+ + 1/24 y x - 1/18 x - 1/12 y x - 1/6 x y + 1/18 x + 1/6 x y ,
+
+ 4 2 3 4
+ COEFF(-1, 1) = 2/3 x y + 1/6 y x - 2/3 y x - 1/6 y x - 2/9 x
+
+ 2 4 3 2 2 3 2 2 2
+ + 1/3 y x + 2/9 x + 8/9 x - 8/9 x + 4/3 x y - 1/3 x y - 4/3 x y ,
+
+ 2 2 4 2 4 4
+ COEFF(0, 1) = -2 y + 4/3 - 1/2 y x + 5/4 y x + 1/3 x - 1/4 y x - y
+
+ 2 2 2 2 3 4
+ + 5/2 x y - 5/3 x , COEFF(1, 1) = - 2/3 y x - 2/3 x y - 2/9 x - 2/9 x
+
+ 4 2 2 2 3 2 4
+ + 8/9 x + 1/6 y x - 4/3 x y - 4/3 x y + 1/6 y x + 1/3 y x
+
+ 3 2 2 2 2 4 2
+ + 1/3 x y + 8/9 x , COEFF(2, 1) = 1/12 x y + 1/18 x - 1/18 x
+
+ 2 4 2 4 3 3 2
+ - 1/12 y x + 1/6 x y - 1/24 y x + 1/12 x y + 1/9 x - 1/6 x y
+
+ 3 2 2 2
+ - 1/9 x - 1/12 y x + 1/24 y x , COEFF(-2, 2) = 1/24 x y + 1/288 x
+
+ 3 2 4 4 3
+ + 1/24 x y + 1/144 x + 1/48 y x - 1/144 x + 1/48 y x - 1/24 y x
+
+ 4 2 2 2 3 2
+ - 1/288 x - 1/48 y x - 1/48 x y - 1/24 x y , COEFF(-1, 2) = - 1/3 x y
+
+ 2 2 2 3 2 2 2 4 3
+ - 1/3 x y + 1/3 x y + 1/12 x y + 1/3 y x - 1/12 y x - 1/72 x
+
+ 2 4 3 4
+ + 1/18 x - 1/18 x + 1/72 x + 1/12 y x - 1/12 y x , COEFF(0, 2) =
+
+ 4 2 4 2 2 4 2 2
+ - 1/48 x - 5/8 y x + 1/2 y + 1/8 y x + 1/2 y + 1/8 y x - 5/8 x y
+
+ 2 3 2 2 2
+ + 5/48 x - 1/12, COEFF(1, 2) = - 1/12 x y + 1/3 x y + 1/3 x y
+
+ 2 4 4 3 3 2
+ + 1/3 x y + 1/72 x - 1/12 y x - 1/12 y x + 1/72 x - 1/18 x
+
+ 2 2 4 3
+ + 1/3 y x - 1/18 x - 1/12 y x , COEFF(2, 2) = - 1/24 x y - 1/144 x
+
+ 2 2 3 2 4 2 3 2
+ - 1/48 x y + 1/24 x y - 1/288 x - 1/48 y x + 1/24 y x + 1/288 x
+
+ 4 2 2 4
+ + 1/48 y x + 1/144 x - 1/24 x y + 1/48 y x ]
+
+> print_coeffs__lc_of_data(%, "coeffs_dyy->coeff_", "fp",
+> "2d.coeffs/2d.cube.order4.smooth0/coeffs-dyy.compute.c");
+bytes used=339598688, alloc=2817532, time=36.92
+bytes used=340598856, alloc=2817532, time=36.99
+bytes used=341599544, alloc=2817532, time=37.04
+bytes used=342609588, alloc=2817532, time=37.12
+bytes used=343617792, alloc=2817532, time=37.21
+bytes used=344618020, alloc=2817532, time=37.30
+bytes used=345618228, alloc=2817532, time=37.79
+bytes used=346618720, alloc=2817532, time=37.87
+bytes used=347618880, alloc=2817532, time=37.94
+bytes used=348623292, alloc=2817532, time=38.03
+bytes used=349623484, alloc=2817532, time=38.12
+bytes used=350623648, alloc=2817532, time=38.22
+bytes used=351625036, alloc=2817532, time=38.32
+bytes used=352625232, alloc=2817532, time=38.73
+bytes used=353625668, alloc=2817532, time=38.91
+bytes used=354625832, alloc=2817532, time=38.99
+bytes used=355626060, alloc=2817532, time=39.14
+bytes used=356630912, alloc=2817532, time=39.56
+bytes used=357631128, alloc=2817532, time=39.78
+bytes used=358631348, alloc=2817532, time=39.86
+bytes used=359632096, alloc=2817532, time=40.02
+bytes used=360632268, alloc=2817532, time=40.42
+bytes used=361632468, alloc=2817532, time=40.49
+bytes used=362632652, alloc=2817532, time=40.71
+bytes used=363633064, alloc=2817532, time=41.09
+bytes used=364633244, alloc=2817532, time=41.18
+bytes used=365633400, alloc=2817532, time=41.60
+bytes used=366633640, alloc=2817532, time=41.81
+>
+################################################################################
+> quit
+bytes used=367598444, alloc=2817532, time=41.95