Consider a file file.txt
having the form
# First line is a grid of y; Starting from second line: first number is a, second is temperature, next is set of numbers is corresponding to f(y) on the grid
0.000000e+00 0.000000e+00 0.000000e+00 2.500000e-01 5.000000e-01
0.100000e+00 0.000000e+01 0.010000e+02 2.500000e-02 5.000000e-02
How to convert it to a form
0.000000e+00 0.000000e+00 0.000000e+00 2.500000e-01 5.000000e-01
0.100000e+00 0.000000e+01 0.010000e+02 2.500000e-02 5.000000e-02
which can be interpreted as numerical data?