cflipsignf

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-ctor' );

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

Examples

var uniform = require( '@stdlib/random-base-uniform' ).factory;
var Complex64 = require( '@stdlib/complex-float32-ctor' );
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 "stdlib/complex/float32/ctor.h"
#include "stdlib/complex/float32/real.h"
#include "stdlib/complex/float32/imag.h"

stdlib_complex64_t z = stdlib_complex64( 2.5f, -1.5f );

stdlib_complex64_t out = stdlib_base_cflipsignf( z, -1.0f );

float re = stdlib_complex64_real( out );
// returns -2.5f

float im = stdlib_complex64_imag( out );
// returns 1.5f

The function accepts the following arguments:

• z: [in] stdlib_complex64_t input value.
• y: [in] float number from which to derive the sign.

stdlib_complex64_t stdlib_base_cflipsignf( const stdlib_complex64_t z, const float y );

Examples

#include "stdlib/math/base/special/cflipsignf.h"
#include "stdlib/complex/float32/ctor.h"
#include "stdlib/complex/float32/reim.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 re1;
    float im1;
    float re2;
    float im2;
    int i;
    for ( i = 0; i < 4; i++ ) {
        v = x[ i ];
        y = stdlib_base_cflipsignf( v, -1.0f );
        stdlib_complex64_reim( v, &re1, &im1 );
        stdlib_complex64_reim( y, &re2, &im2 );
        printf( "cflipsignf(%f + %fi, %f) = %f + %fi\n", re1, im1, -1.0f, re2, im2 );
    }
}

See Also

• @stdlib/complex-float32/base/neg: negate a single-precision complex floating-point number.
• @stdlib/math-base/special/cflipsign: return a double-precision complex floating-point number with the same magnitude as z and the sign of y*z.

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 © 2016-2026. The Stdlib Authors.