DragonFly On-Line Manual Pages


ERF(3)		      DragonFly Library Functions Manual		ERF(3)

NAME

erf, erff, erfl, erfc, erfcf, erfcl -- error function operators

LIBRARY

Math Library (libm, -lm)

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);

DESCRIPTION

These functions calculate the error function of x. The erf(), erff(), and erfl() functions calculate the error function of x; where erf(x) = 2/sqrt(pi)*integral from 0 to x of exp(-t*t) dt. The erfc(), erfcf(), and erfcl() functions calculate the complementary error function of x; that is erfc() subtracts the result of the error function erf(x) from 1.0.

SEE ALSO

math(3)

HISTORY

The erf() and erfc() functions appeared in 4.3BSD. DragonFly 4.1 July 13, 2014 DragonFly 4.1