"grr v time
0.0000000000000	1.0000000000000
0.4000000000000	1.0094420628907
0.8000000000000	1.0381802237077
1.2000000000000	1.0871907188341
1.6000000000000	1.1579173736626
2.0000000000000	1.2520819052806