@stdlib/math-base-special-cflipsignf NPM

cflipsignf

$NPM version$ $Build Status$ $Coverage Status$

Return a single-precision complex floating-point number with the same magnitude as z and the sign of y*z.

Installation

npm install @stdlib/math-base-special-cflipsignf

Usage

var cflipsignf = require( '@stdlib/math-base-special-cflipsignf' );

cflipsignf( z, y )

Returns a single-precision complex floating-point number with the same magnitude as z and the sign of y*z.

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

var v = cflipsignf( new Complex64( -4.0, 5.0 ), -1.0 );
// returns <Complex64>

var re = real( v );
// returns 4.0

var im = imag( v );
// returns -5.0

Examples

var uniform = require( '@stdlib/random-base-uniform' ).factory;
var Complex64 = require( '@stdlib/complex-float32' );
var cflipsignf = require( '@stdlib/math-base-special-cflipsignf' );

var rand = uniform( -50.0, 50.0 );

var z;
var y;
var i;
for ( i = 0; i < 100; i++ ) {
    z = new Complex64( rand(), rand() );
    y = rand();
    console.log( 'cflipsignf(%s, %d) = %s', z, y, cflipsignf( z, y ) );
}

C APIs

Usage

#include "stdlib/math/base/special/cflipsignf.h"

stdlib_base_cflipsignf( z, y )

Returns a single-precision complex floating-point number with the same magnitude as z and the sign of y*z.

#include <complex.h>

float complex y = stdlib_base_cflipsignf( 2.0-1.0*I, -1.0 );
// returns -2.0+1.0*I

The function accepts the following arguments:

z: [in] float complex input value.
y: [in] float number from which to derive the sign.

float complex stdlib_base_cflipsignf( const float complex z, const float y );

Examples

#include "stdlib/math/base/special/cflipsignf.h"
#include <stdio.h>
#include <complex.h>

int main( void ) {
    const float complex x[] = { 3.14f+1.5f*I, -3.14f-1.5f*I, 0.0f+0.0f*I, 0.0f/0.0f+0.0f/0.0f*I };

    float complex v;
    float complex y;
    int i;
    for ( i = 0; i < 4; i++ ) {
        v = x[ i ];
        y = stdlib_base_cflipsignf( v, -1.0f );
        printf( "cflipsignf(%f + %fi, %f) = %f + %fi\n", crealf( v ), cimagf( v ), -1.0f, crealf( y ), cimagf( y ) );
    }
}

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.