@stdlib/blas-gswap

Interchange two vectors.

Usage no npm install needed!

<script type="module">
  import stdlibBlasGswap from 'https://cdn.skypack.dev/@stdlib/blas-gswap';
</script>

README

gswap

NPM version Build Status Coverage Status

Interchange two vectors.

Installation

npm install @stdlib/blas-gswap

Usage

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

gswap( x, y )

Interchanges two 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 ] ) );

gswap( 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 or an array-like object.
  • y: a 1-dimensional ndarray or an array-like object.

Notes

  • gswap() provides a higher-level interface to the BLAS level 1 function gswap.
  • In general, for best performance, especially for large vectors, provide 1-dimensional ndarrays whose underlying data type is either float64 or float32.

Examples

var discreteUniform = require( '@stdlib/random-base-discrete-uniform' ).factory;
var filledarrayBy = require( '@stdlib/array-filled-by' );
var gswap = require( '@stdlib/blas-gswap' );

var rand1 = discreteUniform( 0, 100 );
var x = filledarrayBy( 10, 'generic', rand1 );
console.log( x );

var rand2 = discreteUniform( 0, 10 );
var y = filledarrayBy( 10, 'generic', rand2 );
console.log( y );

gswap( x, y );
console.log( x );
console.log( y );

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.

Community

Chat

License

See LICENSE.

Copyright

Copyright © 2016-2022. The Stdlib Authors.