Error Function

   x       actual       erf(x)
  0.00    0.0000000    0.0000000
  0.10    0.1124629    0.1124629
  0.20    0.2227026    0.2227026
  0.30    0.3286268    0.3286267
  0.40    0.4283924    0.4283924
  0.50    0.5204999    0.5204998
  0.60    0.6038561    0.6038561
  0.70    0.6778012    0.6778012
  0.80    0.7421010    0.7421011
  0.90    0.7969082    0.7969083
  1.00    0.8427008    0.8427008
  1.10    0.8802051    0.8802050
  1.20    0.9103140    0.9103138
  1.30    0.9340079    0.9340079
  1.40    0.9522851    0.9522851
  1.50    0.9661051    0.9661052
  1.60    0.9763484    0.9763484
  1.70    0.9837905    0.9837905
  1.80    0.9890905    0.9890905
  1.90    0.9927904    0.9927904