@stdlib/blas-base-dcabs1

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dcabs1

Compute the sum of the absolute values of the real part and imaginary components of a double-precision complex floating-point number.

Installation

npm install @stdlib/blas-base-dcabs1

Usage

var dcabs1 = require( '@stdlib/blas-base-dcabs1' );

dcabs1( z )

Computes the sum of the absolute values of the real part and imaginary components of a double-precision complex floating-point number.

var Complex128 = require( '@stdlib/complex-float64-ctor' );

var y = dcabs1( new Complex128( 5.0, -3.0 ) );
// returns 8.0

Examples

var Complex128 = require( '@stdlib/complex-float64-ctor' );
var discreteUniform = require( '@stdlib/random-base-discrete-uniform' );
var dcabs1 = require( '@stdlib/blas-base-dcabs1' );

var z;
var i;
for ( i = 0; i < 100; i++ ) {
    z = new Complex128( discreteUniform( -5, 5 ), discreteUniform( -5, 5 ) );
    console.log( 'dcabs1(%s) = %d', z.toString(), dcabs1( z ) );
}

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C APIs

Usage

#include "stdlib/blas/base/dcabs1.h"

c_dcabs1( z )

Computes the sum of the absolute values of the real and imaginary components of a double-precision complex floating-point number.

#include "stdlib/complex/float64/ctor.h"

const stdlib_complex128_t c = stdlib_complex128( 5.0, -3.0 );

double y = c_dcabs1( z );
// returns 8.0

The function accepts the following arguments:

• z: [in] stdlib_complex128_t complex number.

double c_dcabs1( const stdlib_complex128_t z );

Examples

#include "stdlib/blas/base/dcabs1.h"
#include "stdlib/complex/float64/ctor.h"
#include "stdlib/complex/float64/real.h"
#include "stdlib/complex/float64/imag.h"
#include <stdio.h>

int main( void ) {
    const stdlib_complex128_t x[] = {
        stdlib_complex128( 3.14, 1.0 ),
        stdlib_complex128( -3.14, -1.0 ),
        stdlib_complex128( 0.0, 0.0 ),
        stdlib_complex128( 0.0/0.0, 0.0/0.0 )
    };

    float y;
    int i;
    for ( i = 0; i < 4; i++ ) {
        y = c_dcabs1( x[ i ] );
        printf( "f(%lf + %lf) = %lf\n", stdlib_complex128_real( x[ i ] ), stdlib_complex128_imag( x[ i ] ), y );
    }
}

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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

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License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.