SAS/C Library Reference, Vol. 1

erf -- Compute the Error Function

SYNOPSIS

 #include <lcmath.h>

 double erf(double x);

DESCRIPTION

erf computes the error function of its argument x. The value returned by erf is defined by this equation:

RETURN VALUE

erf returns the error function of its argument.

EXAMPLE

This example computes the error function using erf:

  #include <stdio.h>
  #include <lcmath.h>

  #define SVECTOR .7854

  main()
  {
     double erfv;
     erfv = erf(SVECTOR);
     printf("erf(%f) = %fn", SVECTOR, erfv);
  }

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