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RocketLink!--> Man page versions: OpenBSD FreeBSD RedHat Others

ERFC(3)                   OpenBSD Programmer's Manual                  ERFC(3)

     erf, erff, erfc, erfcf - error function operators

     #include <math.h>

     erf(double x);

     erff(float x);

     erfc(double x);

     erfcf(float x);

     These functions calculate the error function of x.

     The erf() calculates the error function of x; where

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

     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.


     The erf() and erfc() functions appeared in 4.3BSD.

OpenBSD 2.6                     April 20, 1991                               1

Source: OpenBSD 2.6 man pages. Copyright: Portions are copyrighted by BERKELEY
SOFTWARE DESIGN, INC., The Regents of the University of California, Massachusetts
Institute of Technology, Free Software Foundation, FreeBSD Inc., and others.

(Corrections, notes, and links courtesy of RocketAware.com)

[Detailed Topics]
FreeBSD Sources for erf(3) functions
FreeBSD Sources for erf(3) functions
OpenBSD sources for erf(3)

[Overview Topics]

Up to: Floating point math - Floating point math (including complex numbers)
Up to: Statistical functions - Statistics, data analysis.

RocketLink!--> Man page versions: OpenBSD FreeBSD RedHat Others

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