# erfcf(3) [osx man page]

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

NAME
erf, erfc -- error function operators

SYNOPSIS
#include <math.h>

double
erf(double x);

long double
erfl(long double x);

float
erff(float x);

double
erfc(double x);

long double
erfcl(long double x);

float
erfcf(float 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() computes the difference of the error function erf(x)
from 1.0.	This is useful, since for large x use of erfc() avoids loss of precision due to cancellation.

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

erf(+-infinity) returns +-1.

erfc(-infinity) returns 2.

erfc(+infinity) returns +0.

math(3)

STANDARDS
The erf() and erfc() functions conform to ISO/IEC 9899:2011.

4.3 Berkeley Distribution					 December 11, 2006					 4.3 Berkeley Distribution```

## Check Out this Related Man Page

```erfc(3M)						  Mathematical Library Functions						  erfc(3M)

NAME
erfc, erfcf, erfcl - complementary error function

SYNOPSIS
cc [ flag... ] file... -lm [ library... ]
#include <math.h>

double erfc(double x);

float erfcf(float x);

long double erfcl(long double x);

DESCRIPTION
These function compute the complementary error function 1.0 - erf(x).

RETURN VALUES
Upon successful completion, these functions return the value of the complementary error function.

If x is NaN, a NaN is returned.

If x is +-0, +1 is returned.

If x is -Inf, +2 is returned.

If x is +Inf, 0 is returned.

ERRORS
No errors are defined.

USAGE
The  erfc() function is provided because of the extreme loss of relative accuracy if erf(x) is called for large x and the result subtracted
from 1.0.

ATTRIBUTES
See attributes(5) for descriptions of the following attributes:

+-----------------------------+-----------------------------+
|      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
+-----------------------------+-----------------------------+
|Interface Stability	     |Standard			   |
+-----------------------------+-----------------------------+
|MT-Level		     |MT-Safe			   |
+-----------------------------+-----------------------------+

SunOS 5.10							    1 Sep 2002								  erfc(3M)```
Man Page

## 1. AIX

Manufacturer Links General Information Home Page: IBM United States Documentation/Information: IBM System p - UNIX servers: Support and services pSeries and AIX Information Center Developerworks AIX Wiki: AIX Wiki AIX for System Administrators In-depth information from IBM: IBM...

## At A Glance Coloured Real Time Bargraph Generator...

Not sure if anyone is interested but I am just getting into UNIX like shell scripting... I have great interest in pseudo-animations in text mode and accessing HW like /dev/dsp for example... ... Have fun, I do... ;o) # !/bin/sh # # Bargraph_Generator.sh # # A DEMO 6 bit coloured...

## When is a _function_ not a _function_?

For a starter I know the braces are NOT in the code... Consider these code snippets:- #!/bin/bash --posix x=0 somefunction() if then echo "I am here." fi # somefunction #!/bin/bash --posix x=0 somefunction() if

## Installing Dash Shell on OS X Lion

For those interested in installing dash shell on OSX Lion to help test POSIX compliancy of shell scripts, it is quite easy. I did it like this: If you don't have gcc on your system: 0. Download and install the Command Line Tools for Xcode package from Sign In - Apple * 1. Download the dash...

## Hearing Aid for OSX 10.12.x and greater.

Hearing Aid... Hi folks yet another bizarre piece of code that is Apple OSX 10.12.x to at least 10.14.1 specific. It requires only a default OSX install, and the internal microphone along with an external headphone assembly. Pre-amble, 14-02-2019: For over 3 weeks now I have been suffering a...

## Shopt -s histappend

What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file. # When the shell exits, append to the history file instead of overwriting it shopt -s histappend

## Undeletable file

Greetings, I'm trying to delete a file with a weird name from within Terminal on a Mac. It's a very old file (1992) with null characters in the name: ââWord FinderÂŽ Plusâ˘. Here are some examples of what I've tried: 12FX009:5 dpontius\$ ls ââWord FinderÂŽ Plusâ˘ 12FX009:5 dpontius\$ rm...

## To print diamond asterisk pattern based on inputs

I have to print the number of stars that increases on each line from the minimum number until it reaches the maximum number, and then decreases until it goes back to the minimum number. After printing out the lines of stars, it should also print the total number of stars printed. I have tried...

## My first PERL incarnation... Audio Oscillograph

Hi all... Well guys and gals, I jumped in at the deep end and found things that PERL cannot do by default. Many tricky terminal escape codes are not catered for so I had to create workarounds. One thing I searched for was this: Passing perl variable to shell command AND, @Neo this was...

## A dash to GOTO or a dash from GOTO, that is the question...

Well, guys I saw a question about GOTO for Python. So this gave me the inspiration to attempt a GOTO function for 'dash', (bash and ksh too). Machine: MBP OSX 10.14.3, default bash terminal, calling '#!/usr/local/bin/dash'... This is purely a fun project to see if it is possible in PURE...

## Syntax error in subtraction in Bash

I am sharing a code snippet. for (( i=0; i<=\$(( \$count -1 )); i++ )) do first=\${barr2} search=\${barr1} echo \$first echo "loop begins" for (( j=0; j<=5000; j++ )) do if } == \$search ]]; then echo \$j break; fi done second=\${harr2} echo \$second

## Python: Refer a properties file from different location

Hi All, I'm having a python script: test.py in /path/to/script/test.py I'm using a properties file: test_properties.py (it is having values as dictionary{}) which is in same DIR as the script. Sample Properties file: params = { 'target_db' : 'a1_db' 'src_db' : ...