#!/usr/bin/env python
     # encoding: utf-8
     #
     # Copyright (c) 2010 Doug Hellmann.  All rights reserved.
     #
     """Gauss Error Function
     """
     #end_pymotw_header
     
     import math
     
     print '{:^5}  {:7}'.format('x', 'erfc(x)')
     print '{:-^5}  {:-^7}'.format('', '')
     
     for x in [ -3, -2, -1, -0.5, -0.25, 0, 0.25, 0.5, 1, 2, 3 ]:
         print '{:5.2f}  {:7.4f}'.format(x, math.erfc(x))