@stdlib/math-base-special-abs2
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    0.0.7 • Public • Published

    abs2

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    Compute the squared absolute value of a double-precision floating-point number.

    Installation

    npm install @stdlib/math-base-special-abs2

    Usage

    var abs2 = require( '@stdlib/math-base-special-abs2' );

    abs2( x )

    Computes the squared absolute value of a double-precision floating-point number.

    var v = abs2( -1.0 );
    // returns 1.0
    
    v = abs2( 2.0 );
    // returns 4.0
    
    v = abs2( 0.0 );
    // returns 0.0
    
    v = abs2( -0.0 );
    // returns 0.0
    
    v = abs2( NaN );
    // returns NaN

    Examples

    var randu = require( '@stdlib/random-base-randu' );
    var round = require( '@stdlib/math-base-special-round' );
    var abs2 = require( '@stdlib/math-base-special-abs2' );
    
    var x;
    var i;
    
    for ( i = 0; i < 100; i++ ) {
        x = round( randu() * 100.0 ) - 50.0;
        console.log( 'abs2(%d) = %d', x, abs2( x ) );
    }

    C APIs

    Installation

    npm install @stdlib/math-base-special-abs2

    Usage

    #include "stdlib/math/base/special/abs2.h"

    stdlib_base_abs2( x )

    Computes the squared absolute value of a double-precision floating-point number.

    double y = stdlib_base_abs2( -5.0 );
    // returns 25.0

    The function accepts the following arguments:

    • x: [in] double input value.
    double stdlib_base_abs2( const double x );

    Examples

    #include "stdlib/math/base/special/abs2.h"
    #include <stdio.h>
    
    int main() {
        double x[] = { 3.14, -3.14, 0.0, 0.0/0.0 };
    
        double y;
        int i;
        for ( i = 0; i < 4; i++ ) {
            y = stdlib_base_abs2( x[ i ] );
            printf( "abs2(%lf) = %lf\n", x[ i ], y );
        }
    }

    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.

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    License

    See LICENSE.

    Copyright

    Copyright © 2016-2021. The Stdlib Authors.

    Install

    npm i @stdlib/math-base-special-abs2

    Homepage

    stdlib.io

    DownloadsWeekly Downloads

    10

    Version

    0.0.7

    License

    Apache-2.0

    Unpacked Size

    48.5 kB

    Total Files

    16

    Last publish

    Collaborators

    • stdlib-bot
    • kgryte
    • planeshifter
    • rreusser