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imag
Return the imaginary component of a doubleprecision complex floatingpoint number.
Installation
npm install @stdlib/compleximag
Usage
var imag = require( '@stdlib/compleximag' );
imag( z )
Returns the imaginary component of a doubleprecision complex floatingpoint number.
var Complex128 = require( '@stdlib/complexfloat64' );
var z = new Complex128( 5.0, 3.0 );
var im = imag( z );
// returns 3.0
Examples
var Complex128 = require( '@stdlib/complexfloat64' );
var randu = require( '@stdlib/randombaserandu' );
var round = require( '@stdlib/mathbasespecialround' );
var imag = require( '@stdlib/compleximag' );
var re;
var im;
var z;
var i;
for ( i = 0; i < 100; i++ ) {
re = round( (randu()*100.0)  50.0 );
im = round( (randu()*50.0)  25.0 );
z = new Complex128( re, im );
console.log( 'imag(%s) = %d', z.toString(), imag( z ) );
}
C APIs
Usage
#include "stdlib/complex/imag.h"
stdlib_imag( z )
Returns the imaginary component of a doubleprecision complex floatingpoint number.
#include "stdlib/complex/float64.h"
stdlib_complex128_t z = stdlib_complex128( 5.0, 2.0 );
// ...
double im = stdlib_imag( z );
// returns 2.0
The function accepts the following arguments:

z:
[in] stdlib_complex128_t
doubleprecision complex floatingpoint number.
double stdlib_imag( const stdlib_complex128_t z );
Examples
#include "stdlib/complex/imag.h"
#include "stdlib/complex/float64.h"
#include <stdio.h>
int main( void ) {
const stdlib_complex128_t x[] = {
stdlib_complex128( 5.0, 2.0 ),
stdlib_complex128( 2.0, 1.0 ),
stdlib_complex128( 0.0, 0.0 ),
stdlib_complex128( 0.0/0.0, 0.0/0.0 )
};
int i;
for ( i = 0; i < 4; i++ ) {
printf( "imag(v) = %lf\n", stdlib_imag( x[ i ] ) );
}
}
See Also

@stdlib/complexreal
: return the real component of a doubleprecision complex floatingpoint number. 
@stdlib/complexreim
: return the real and imaginary components of a doubleprecision complex floatingpoint number.
Notice
This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.
Community
License
See LICENSE.
Copyright
Copyright © 20162024. The Stdlib Authors.