nag_erf (s15aec) Example Program Results
     x           y
  -6.000e+00  -1.000e+00
  -4.500e+00  -1.000e-00
  -1.000e+00  -8.427e-01
   1.000e+00   8.427e-01
   4.500e+00   1.000e-00
   6.000e+00   1.000e+00