nag_kelvin_ker (s19acc) Example Program Results
     x           y
   1.000e-01   2.420e+00
   1.000e+00   2.867e-01
   2.500e+00  -6.969e-02
   5.000e+00  -1.151e-02
   1.000e+01   1.295e-04
   1.500e+01  -1.514e-08