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cabsf
Compute the absolute value of a single-precision complex floating-point number.
The absolute value of a complex number is defined as
which corresponds to the length of a vector from the origin to a complex value plotted in the complex plane.
Installation
npm install @stdlib/math-base-special-cabsf
Usage
var cabsf = require( '@stdlib/math-base-special-cabsf' );
cabsf( z )
Computes an absolute value of a single-precision complex floating-point number.
var Complex64 = require( '@stdlib/complex-float32' );
var y = cabsf( new Complex64( 5.0, 3.0 ) );
// returns ~5.83
Examples
var Complex64 = require( '@stdlib/complex-float32' );
var discreteUniform = require( '@stdlib/random-base-discrete-uniform' ).factory;
var cabsf = require( '@stdlib/math-base-special-cabsf' );
// Create a PRNG to generate uniformly distributed pseudorandom integers:
var rand = discreteUniform( -50, 50 );
// Compute the absolute value for a set of random numbers...
var z;
var i;
for ( i = 0; i < 100; i++ ) {
z = new Complex64( rand(), rand() );
console.log( 'cabsf(%s) = %d', z.toString(), cabsf( z ) );
}
C APIs
Usage
#include "stdlib/math/base/special/cabsf.h"
stdlib_base_cabsf( z )
Computes an absolute value of a single-precision complex floating-point number.
#include <complex.h>
float y = stdlib_base_cabsf( 5.0+3.0*I );
// returns ~5.83f
The function accepts the following arguments:
-
z:
[in] float complex
input value.
float stdlib_base_cabsf( const float complex z );
Examples
#include "stdlib/math/base/special/cabsf.h"
#include <stdio.h>
#include <complex.h>
int main( void ) {
const float complex x[] = { 3.14f+1.0f*I, -3.14f-1.0f*I, 0.0f+0.0f*I, 0.0f/0.0f+0.0f/0.0f*I };
float complex v;
float y;
int i;
for ( i = 0; i < 4; i++ ) {
v = x[ i ];
y = stdlib_base_cabsf( v );
printf( "f(%f + %f) = %f\n", crealf( v ), cimagf( v ), y );
}
}
See Also
-
@stdlib/math-base/special/cabs
: compute the absolute value of a double-precision complex floating-point number. -
@stdlib/math-base/special/cabs2f
: compute the squared absolute value of a single-precision complex floating-point number. -
@stdlib/math-base/special/absf
: compute the absolute value of a single-precision floating-point number.
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 © 2016-2024. The Stdlib Authors.