ERF
Section: Linux Programmer's Manual (3)
Updated: 2002-07-27
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NAME
erf, erff, erfl, erfc, erfcf, erfcl - error function and complementary error function
SYNOPSIS
#include <math.h>
double erf(double x);
float erff(float x);
long double erfl(long double x);
double erfc(double x);
float erfcf(float x);
long double erfcl(long double x);
Link with -lm.
DESCRIPTION
The 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 erfc() function returns the complementary error function of
x, that is 1.0 - erf(x).
CONFORMING TO
SVID 3, BSD 4.3, C99.
The float and long double variants are requirements of C99.
SEE ALSO
cerf(3),
exp(3)
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- CONFORMING TO
-
- SEE ALSO
-
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