ERF
Section: C Library Functions (3)
Index
Return to Main Contents
BSD mandoc
BSD 4.3
NAME
erf
erfc
- error function operators
SYNOPSIS
Fd #include <math.h>
Ft double
Fn erf double x
Ft double
Fn erfc double x
DESCRIPTION
These functions calculate the error function of
Fa x .
The
Fn erf
calculates the error function of x; where
erf(x) = 2/sqrt(pi)*integral from 0 to x of exp(-t*t) dt.
The
Fn erfc
function calculates the complementary error function of
Fa x ;
that is
Fn erfc
subtracts the result of the error function
Fn erf x
from 1.0.
This is useful, since for large
Fa x
places disappear.
SEE ALSO
math(3)
HISTORY
The
Fn erf
and
Fn erfc
functions appeared in
BSD 4.3
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- SEE ALSO
-
- HISTORY
-
This document was created by
man2html,
using the manual pages.
Time: 08:43:27 GMT, September 19, 2022