NAME
erf, erff, erfl, erfc, erfcf, erfcl - error function and
complementary error function
SYNOPSIS
#include <math.h>
I double erf(double x );
I float erff(float x );
I long double erfl(long double x );
I double erfc(double x );
I float erfcf(float x );
I long double erfcl(long double x );
Link with
-lm.
DESCRIPTION
The
R erf ()
function returns the error function of x; defined
as
erf(x) = 2/sqrt(pi)* integral from 0 to x of exp(-t*t) dt
The
R erfc ()
function returns the complementary error function of
x, that is 1.0 - erf(x).
CONFORMING TO
SVr4, 4.3BSD, C99.
The
float
and
long double
variants are requirements of C99.
SEE ALSO
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