Negate a single-precision complex floating-point number.
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> Negate a single-precision complex floating-point number.
``bash`
npm install @stdlib/complex-float32-base-neg
`javascript`
var cnegf = require( '@stdlib/complex-float32-base-neg' );
#### cnegf( z )
Negates a single-precision complex floating-point number.
`javascript
var Complex64 = require( '@stdlib/complex-float32-ctor' );
var z = new Complex64( -4.0, 5.0 );
var out = cnegf( z );
// returns
z = new Complex64( 0.0, 0.0 );
out = cnegf( z );
// returns
z = new Complex64( NaN, NaN );
out = cnegf( z );
// returns
`
`javascript
var Complex64 = require( '@stdlib/complex-float32-ctor' );
var discreteUniform = require( '@stdlib/random-base-discrete-uniform' );
var cnegf = require( '@stdlib/complex-float32-base-neg' );
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`
#include "stdlib/complex/float32/base/neg.h"
#### stdlib_base_complex64_neg( z )
Negates a single-precision complex floating-point number.
`c
#include "stdlib/complex/float32/ctor.h"
#include "stdlib/complex/float32/real.h"
#include "stdlib/complex/float32/imag.h"
stdlib_complex64_t z = stdlib_complex64( 3.0f, -2.0f );
stdlib_complex64_t out = stdlib_base_complex64_neg( z );
float re = stdlib_complex64_real( out );
// returns -3.0f
float im = stdlib_complex64_imag( out );
// returns 2.0f
`
The function accepts the following arguments:
- z: [in] stdlib_complex64_t input value.
`c`
stdlib_complex64_t stdlib_base_complex64_neg( const stdlib_complex64_t z );
`c
#include "stdlib/complex/float32/base/neg.h"
#include "stdlib/complex/float32/ctor.h"
#include "stdlib/complex/float32/reim.h"
#include
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_complex64_reim( v, &re, &im );
printf( "z = %f + %fi\n", re, im );
y = stdlib_base_complex64_neg( v );
stdlib_complex64_reim( y, &re, &im );
printf( "cnegf(z) = %f + %fi\n", re, im );
}
}
`
*
- [@stdlib/complex-float64/base/neg][@stdlib/complex/float64/base/neg]: negate a double-precision complex floating-point number.
- [@stdlib/math-base/special/cabsf][@stdlib/math/base/special/cabsf]: compute the absolute value of a single-precision complex floating-point number.
*
This package is part of [stdlib][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][stdlib], see the main project [repository][stdlib].
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---
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