@stdlib/complex-imagf NPM

imagf

Return the imaginary component of a single-precision complex floating-point number.

Installation

npm install @stdlib/complex-imagf

Usage

var imagf = require( '@stdlib/complex-imagf' );

imagf( z )

Returns the imaginary component of a single-precision complex floating-point number.

var Complex64 = require( '@stdlib/complex-float32' );

var z = new Complex64( 5.0, 3.0 );
var im = imagf( z );
// returns 3.0

Examples

var Complex64 = require( '@stdlib/complex-float32' );
var randu = require( '@stdlib/random-base-randu' );
var round = require( '@stdlib/math-base-special-round' );
var imagf = require( '@stdlib/complex-imagf' );

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 Complex64( re, im );
    console.log( 'imagf(%s) = %d', z.toString(), imagf( z ) );
}

C APIs

Usage

#include "stdlib/complex/imagf.h"

stdlib_imagf( z )

Returns the imaginary component of a single-precision complex floating-point number.

#include "stdlib/complex/float32.h"

stdlib_complex64_t z = stdlib_complex64( 5.0f, 2.0f );

// ...

float im = stdlib_imagf( z );
// returns 2.0f

The function accepts the following arguments:

z: [in] stdlib_complex64_t single-precision complex floating-point number.

float stdlib_imagf( const stdlib_complex64_t z );

Examples

#include "stdlib/complex/imagf.h"
#include "stdlib/complex/float32.h"
#include <stdio.h>

int main( void ) {
    const stdlib_complex64_t x[] = {
        stdlib_complex64( 5.0f, 2.0f ),
        stdlib_complex64( -2.0f, 1.0f ),
        stdlib_complex64( 0.0f, -0.0f ),
        stdlib_complex64( 0.0f/0.0f, 0.0f/0.0f )
    };

    int i;
    for ( i = 0; i < 4; i++ ) {
        printf( "imagf(v) = %f\n", stdlib_imagf( x[ i ] ) );
    }
}

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.