erf(), erff(), erfc(), erfcf() -- error function operators

SYNOPSIS

#include <math.h>

double erf(double x)

float erff(float x)

double erfc(double x)

float erfcf(float x)

DESCRIPTION

The erf() function computes the error function of x, defined as:

The erfc() function calculates the complementary error function of x; that is erfc() subtracts the result of the error function erf(x) from 1.0. This is useful, since for large x places disappear.

PARAMETERS

x: Specifies order of error function.

RETURN VALUES

On success, these functions return the value of the error function as defined above.

If x is NaN, NaN is returned.

If the correct value would cause underflow, 0 is returned.

CONFORMANCE

UNIX 98.

MULTITHREAD SAFETY LEVEL

MT-Safe.

PORTING ISSUES

None.

AVAILABILITY

MKS Toolkit for Professional Developers
MKS Toolkit for Enterprise Developers
MKS Toolkit for Enterprise Developers 64-Bit Edition

erf(), erff(), erfc(), erfcf()
error function operators

Function