@stdlib/blas-dswap
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    0.0.6 • Public • Published

    dswap

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    Interchange two double-precision floating-point vectors.

    Installation

    npm install @stdlib/blas-dswap

    Usage

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

    dswap( x, y )

    Interchanges two double-precision floating-point vectors x and y.

    var Float64Array = require( '@stdlib/array-float64' );
    var array = require( '@stdlib/ndarray-array' );
    
    var x = array( new Float64Array( [ 4.0, 2.0, -3.0, 5.0, -1.0 ] ) );
    var y = array( new Float64Array( [ 2.0, 6.0, -1.0, -4.0, 8.0 ] ) );
    
    dswap( x, y );
    
    var xbuf = x.data;
    // returns <Float64Array>[ 2.0, 6.0, -1.0, -4.0, 8.0 ]
    
    var ybuf = y.data;
    // returns <Float64Array>[ 4.0, 2.0, -3.0, 5.0, -1.0 ]

    The function has the following parameters:

    • x: a 1-dimensional ndarray whose underlying data type is float64.
    • y: a 1-dimensional ndarray whose underlying data type is float64.

    Notes

    • dswap() provides a higher-level interface to the BLAS level 1 function dswap.

    Examples

    var discreteUniform = require( '@stdlib/random-base-discrete-uniform' );
    var Float64Array = require( '@stdlib/array-float64' );
    var array = require( '@stdlib/ndarray-array' );
    var dswap = require( '@stdlib/blas-dswap' );
    
    var x = array( new Float64Array( 10 ) );
    var y = array( new Float64Array( 10 ) );
    
    var rand1 = discreteUniform.factory( 0, 100 );
    var rand2 = discreteUniform.factory( 0, 10 );
    
    var i;
    for ( i = 0; i < x.length; i++ ) {
        x.set( i, rand1() );
        y.set( i, rand2() );
    }
    console.log( x.data );
    console.log( y.data );
    
    dswap( x, y );
    console.log( x.data );
    console.log( y.data );

    See Also


    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 © 2016-2022. The Stdlib Authors.

    Install

    npm i @stdlib/blas-dswap

    Homepage

    stdlib.io

    DownloadsWeekly Downloads

    31

    Version

    0.0.6

    License

    Apache-2.0

    Unpacked Size

    41.8 kB

    Total Files

    9

    Last publish

    Collaborators

    • stdlib-bot
    • kgryte
    • planeshifter
    • rreusser