@stdlib/math-base-ops-cnegf NPM

cnegf

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

Negate a single-precision complex floating-point number.

Installation

npm install @stdlib/math-base-ops-cnegf

Usage

var cnegf = require( '@stdlib/math-base-ops-cnegf' );

cnegf( z )

Negates a single-precision complex floating-point number.

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

var z = new Complex64( -4.0, 5.0 );

var out = cnegf( z );
// returns <Complex64>

var re = realf( out );
// returns 4.0

var im = imagf( out );
// returns -5.0

z = new Complex64( 0.0, 0.0 );

out = cnegf( z );
// returns <Complex64>

re = realf( out );
// returns -0.0

im = imagf( out );
// returns -0.0

z = new Complex64( NaN, NaN );

out = cnegf( z );
// returns <Complex64>

re = realf( out );
// returns NaN

im = imagf( out );
// returns NaN

Examples

var Complex64 = require( '@stdlib/complex-float32' );
var discreteUniform = require( '@stdlib/random-base-discrete-uniform' );
var cnegf = require( '@stdlib/math-base-ops-cnegf' );

function randomComplex() {
    var re = discreteUniform( -50, 50 );
    var im = discreteUniform( -50, 50 );
    return new Complex64( re, im );
}

var z;
var o;
var i;

for ( i = 0; i < 100; i++ ) {
    z = randomComplex();
    o = cnegf( z );
    console.log( 'negate(%s) = %s', z.toString(), o.toString() );
}

C APIs

Usage

#include "stdlib/math/base/ops/cnegf.h"

stdlib_base_cnegf( z )

Negates a single-precision complex floating-point number.

#include "stdlib/complex/float32.h"
#include "stdlib/complex/realf.h"
#include "stdlib/complex/imagf.h"

stdlib_complex64_t z = stdlib_complex64( 3.0f, -2.0f );
stdlib_complex64_t out = stdlib_base_cnegf( z );

float re = stdlib_realf( out );
// returns -3.0f

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

The function accepts the following arguments:

z: [in] stdlib_complex64_t input value.

stdlib_complex64_t stdlib_base_cnegf( const stdlib_complex64_t z );

Examples

#include "stdlib/math/base/ops/cnegf.h"
#include "stdlib/complex/float32.h"
#include "stdlib/complex/reimf.h"
#include <stdio.h>

int main( void ) {
    const stdlib_complex64_t x[] = {
        stdlib_complex64( 3.14f, 1.5f ),
        stdlib_complex64( -3.14f, 1.5f ),
        stdlib_complex64( 0.0f, -0.0f ),
        stdlib_complex64( 0.0f/0.0f, 0.0f/0.0f )
    };

    stdlib_complex64_t v;
    stdlib_complex64_t y;
    float re;
    float im;
    int i;
    for ( i = 0; i < 4; i++ ) {
        v = x[ i ];
        stdlib_reimf( v, &re, &im );
        printf( "z = %f + %fi\n", re, im );

        y = stdlib_base_cnegf( v );
        stdlib_reimf( y, &re, &im );
        printf( "cnegf(z) = %f + %fi\n", re, im );
    }
}

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.