CREAL(3) BSD Library Functions Manual CREAL(3)NAME
creal -- complex real-part function
cimag -- complex imaginary-part function
SYNOPSIS
#include <complex.h>
double
creal(double complex z);
long double
creall(long double complex z);
float
crealf(float complex z);
double
cimag(double complex z);
long double
cimagl(long double complex z);
float
cimagf(float complex z);
DESCRIPTION
creal(z) extracts the real part of the complex floating-point number z. cimag(z) extracts the imaginary part of the complex floating-point
number z.
If z = x+iy, then creal(z) = x and cimag(z) = y.
EXAMPLES
The function foo defined in the example below returns its complex argument with the imaginary part scaled by a factor of 2.
#include <complex.h>
double complex foo(double complex z) {
return creal(z) + 2.0*cimag(z)*I;
}
SEE ALSO complex(3)STANDARDS
The creal() and cimag() functions conform to ISO/IEC 9899:2011.
4th Berkeley Distribution December 11, 2006 4th Berkeley Distribution
Check Out this Related Man Page
CIMAG(3) BSD Library Functions Manual CIMAG(3)NAME
cimag, cimagf, cimagl, conj, conjf, conjl, cproj, cprojf, cprojl, creal, crealf, creall -- functions to manipulate complex numbers
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
#include <complex.h>
double
cimag(double complex z);
float
cimagf(float complex z);
long double
cimagl(long double complex z);
double complex
conj(double complex z);
float complex
conjf(float complex z);
long double complex
conjl(long double complex z);
double complex
cproj(double complex z);
float complex
cprojf(float complex z);
long double complex
cprojl(long double complex z);
double
creal(double complex z);
float
crealf(float complex z);
long double
creall(long double complex z);
DESCRIPTION
Let a+b*i denote the complex number z.
The creal() functions return the real part a, and the cimag() functions return the imaginary part b.
The conj() functions return the complex conjugate a-b*i.
The cproj() functions return the projection onto the Riemann sphere. If z contains an infinite component, then the result is infinity +-
0*i, where the (zero) imaginary part of the result has the same sign as b. Otherwise, the result is z.
These functions do not signal any floating point exceptions.
STANDARDS
The cimag(), conj(), cproj(), and creal() functions conform to ISO/IEC 9899:1999 (``ISO C99'').
HISTORY
The cimag(), conj() and creal() functions first appeared in FreeBSD 5.3. The cproj() functions appeared in FreeBSD 8.0.
BSD August 7, 2008 BSD
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... (0 Replies)
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... (0 Replies)
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 (2 Replies)
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... (2 Replies)
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... (3 Replies)
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 (3 Replies)
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: ââWord FinderÂŽ Plusâ˘.
Here are some examples of what I've tried:
12FX009:5 dpontius$ ls
ââWord FinderÂŽ Plusâ˘
12FX009:5 dpontius$ rm... (29 Replies)
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... (13 Replies)
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... (15 Replies)
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... (3 Replies)
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 (2 Replies)
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' : ... (15 Replies)