Unix/Linux Go Back    


OpenDarwin 7.2.1 - man page for erf (opendarwin section 3)

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:   man
Select Man Page Set:       apropos Keyword Search (sections above)


ERF(3)				   BSD Library Functions Manual 			   ERF(3)

NAME
     erf, erfc -- error function operators

SYNOPSIS
     #include <math.h>

     double
     erf(double x);

     double
     erfc(double x);

DESCRIPTION
     These functions calculate the error function of x.

     The erf() function 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() sub-
     tracts the result of the error function erf(x) from 1.0.  This is useful, since for large x
     places disappear.

SPECIAL VALUES
     erf(+-0) returns +-0.

     erf(+-infinity) returns +-1.

     erfc(-infinity) returns 2.

     erfc(+infinity) returns +0.

SEE ALSO
     math(3)

STANDARDS
     The erf() and erfc() functions conform to ISO/IEC 9899:1999(E).

4.3 Berkeley Distribution		 January 30, 2003		4.3 Berkeley Distribution
Unix & Linux Commands & Man Pages : ©2000 - 2018 Unix and Linux Forums


All times are GMT -4. The time now is 10:53 PM.