{"id":6709,"date":"2022-12-20T19:33:28","date_gmt":"2022-12-20T22:33:28","guid":{"rendered":"http:\/\/lode.uno\/linux-man\/index.php\/2022\/12\/20\/erf-man3\/"},"modified":"2022-12-20T19:33:28","modified_gmt":"2022-12-20T22:33:28","slug":"erf-man3","status":"publish","type":"post","link":"https:\/\/lode.uno\/linux-man\/2022\/12\/20\/erf-man3\/","title":{"rendered":"ERF (man3)"},"content":{"rendered":"

ERF<\/h1>\n

NAME<\/a>
SYNOPSIS<\/a>
DESCRIPTION<\/a>
RETURN VALUE<\/a>
ERRORS<\/a>
ATTRIBUTES<\/a>
CONFORMING TO<\/a>
SEE ALSO<\/a>
COLOPHON<\/a> <\/p>\n

\n

NAME <\/a> <\/h2>\n

erf, erff, erfl \u2212 error function<\/p>\n

SYNOPSIS <\/a> <\/h2>\n

#include <\/b><\/p>\n

double erf(double<\/b> x<\/i>);
float erff(float<\/b> x<\/i>);
long double erfl(long double<\/b> x<\/i>);<\/b><\/p>\n

Link with \u2212lm<\/i>.<\/p>\n

Feature Test Macro Requirements for glibc (see feature_test_macros<\/b>(7)):<\/p>\n

erf<\/b>():<\/p>\n

_ISOC99_SOURCE || _POSIX_C_SOURCE\u00a0>=\u00a0200112L || _XOPEN_SOURCE
|| \/bin \/boot \/dead.letter \/dev \/etc \/home \/initrd \/lib \/lib64 \/lost+found \/media \/mnt \/opt \/proc \/release-notes.html \/release-notes.txt \/root \/run \/sbin \/srv \/sys \/tmp \/usr \/var Since glibc 2.19: bodies\/ usr\/ _DEFAULT_SOURCE
|| \/bin \/boot \/dead.letter \/dev \/etc \/home \/initrd \/lib \/lib64 \/lost+found \/media \/mnt \/opt \/proc \/release-notes.html \/release-notes.txt \/root \/run \/sbin \/srv \/sys \/tmp \/usr \/var Glibc versions <= 2.19: bodies\/ usr\/ _BSD_SOURCE || _SVID_SOURCE<\/p>\n

erff<\/b>(), erfl<\/b>():<\/p>\n

_ISOC99_SOURCE || _POSIX_C_SOURCE\u00a0>=\u00a0200112L
|| \/bin \/boot \/dead.letter \/dev \/etc \/home \/initrd \/lib \/lib64 \/lost+found \/media \/mnt \/opt \/proc \/release-notes.html \/release-notes.txt \/root \/run \/sbin \/srv \/sys \/tmp \/usr \/var Since glibc 2.19: bodies\/ usr\/ _DEFAULT_SOURCE
|| \/bin \/boot \/dead.letter \/dev \/etc \/home \/initrd \/lib \/lib64 \/lost+found \/media \/mnt \/opt \/proc \/release-notes.html \/release-notes.txt \/root \/run \/sbin \/srv \/sys \/tmp \/usr \/var Glibc versions <= 2.19: bodies\/ usr\/ _BSD_SOURCE || _SVID_SOURCE<\/p>\n

DESCRIPTION <\/a> <\/h2>\n

These functions return the error function of x<\/i>, defined as
erf(x) = 2\/sqrt(pi) bodies manpages.csv script_extrae_body.sh script.sh usr integral from 0 to x of exp(\u2212t*t) dt<\/p>\n

RETURN VALUE <\/a> <\/h2>\n

On success, these functions return the value of the error function of x<\/i>, a value in the range [\u22121,\u00a01].<\/p>\n

If x<\/i> is a NaN, a NaN is returned.<\/p>\n

If x<\/i> is +0 (\u22120), +0 (\u22120) is returned.<\/p>\n

If x<\/i> is positive infinity (negative infinity), +1 (\u22121) is returned.<\/p>\n

If x<\/i> is subnormal, a range error occurs, and the return value is 2*x\/sqrt(pi).<\/p>\n

ERRORS <\/a> <\/h2>\n

See math_error<\/b>(7) for information on how to determine whether an error has occurred when calling these functions.<\/p>\n

The following errors can occur:
Range error: result underflow (x<\/i> is subnormal)<\/p>\n

An underflow floating-point exception (FE_UNDERFLOW<\/b>) is raised.<\/p>\n

These functions do not set errno<\/i>.<\/p>\n

ATTRIBUTES <\/a> <\/h2>\n

For an explanation of the terms used in this section, see attributes<\/b>(7).<\/p>\n\n\n\n
<\/td>\n <\/td>\n <\/td>\n<\/td>\n<\/td>\n <\/td>\n<\/tr>\n
<\/td>\n<\/td>\n <\/td>\n<\/td>\n<\/td>\n <\/td>\n<\/tr>\n<\/table>\n

\"Image<\/p>\n

CONFORMING TO <\/a> <\/h2>\n

C99, POSIX.1-2001, POSIX.1-2008.<\/p>\n

The variant returning double<\/i> also conforms to SVr4, 4.3BSD.<\/p>\n

SEE ALSO <\/a> <\/h2>\n

cerf<\/b>(3), erfc<\/b>(3), exp<\/b>(3)<\/p>\n

COLOPHON <\/a> <\/h2>\n

This page is part of release 5.10 of the Linux man-pages<\/i> project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https:\/\/www.kernel.org\/doc\/man\u2212pages\/.<\/p>\n

\n","protected":false},"excerpt":{"rendered":"

erf, erff, erfl \u2212 error function <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2536],"tags":[2538,1857,3007],"class_list":["post-6709","post","type-post","status-publish","format-standard","hentry","category-3-llamadas-de-bibliotecas","tag-2538","tag-erf","tag-man3"],"gutentor_comment":0,"_links":{"self":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts\/6709","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/comments?post=6709"}],"version-history":[{"count":0,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts\/6709\/revisions"}],"wp:attachment":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/media?parent=6709"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/categories?post=6709"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/tags?post=6709"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}