erf()

Computes the Gauss error function.

  #include <math.h>
  double erf(double x);

Parameter

x

The value to compute.

Remarks

This function is defined as

  erf(x) = 2/sqrt(pi) * ( integral from 
  0 to 
  x of 
  exp(pow(-t, 2)) 
  dt
  )

This facility may not be available on configurations of the EWL that run on platforms that do not have floating-point math capabilities.

Listing: Example of erf() usage


#include <math.h>

#include <stdio.h>

int main(void)

{

double g = +10.0;

printf("The error function of (%f) = %f.\n", g, erf(g));

return 0;

}

Output:

The error function of (10.000000) = 1.000000.