https://github.com/stdlib-js/blas-base-srotg
Construct a Givens plane rotation.
https://github.com/stdlib-js/blas-base-srotg
algebra array blas float float32 float32array javascript level-1 linear math mathematics ndarray node node-js nodejs single srotg stdlib subroutines vector
Last synced: 6 months ago
JSON representation
Construct a Givens plane rotation.
- Host: GitHub
- URL: https://github.com/stdlib-js/blas-base-srotg
- Owner: stdlib-js
- License: apache-2.0
- Created: 2023-02-28T23:33:48.000Z (over 2 years ago)
- Default Branch: main
- Last Pushed: 2025-03-10T02:17:29.000Z (7 months ago)
- Last Synced: 2025-04-11T04:44:00.848Z (6 months ago)
- Topics: algebra, array, blas, float, float32, float32array, javascript, level-1, linear, math, mathematics, ndarray, node, node-js, nodejs, single, srotg, stdlib, subroutines, vector
- Language: JavaScript
- Homepage: https://github.com/stdlib-js/stdlib
- Size: 576 KB
- Stars: 1
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
- Code of conduct: CODE_OF_CONDUCT.md
- Citation: CITATION.cff
- Security: SECURITY.md
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README
About stdlib...
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# srotg
[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url]
> Construct a Givens plane rotation.
## Installation
```bash
npm install @stdlib/blas-base-srotg
```
Alternatively,
- To load the package in a website via a `script` tag without installation and bundlers, use the [ES Module][es-module] available on the [`esm`][esm-url] branch (see [README][esm-readme]).
- If you are using Deno, visit the [`deno`][deno-url] branch (see [README][deno-readme] for usage intructions).
- For use in Observable, or in browser/node environments, use the [Universal Module Definition (UMD)][umd] build available on the [`umd`][umd-url] branch (see [README][umd-readme]).
The [branches.md][branches-url] file summarizes the available branches and displays a diagram illustrating their relationships.
To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.
## Usage
```javascript
var srotg = require( '@stdlib/blas-base-srotg' );
```
#### srotg( a, b )
Constructs a Givens plane rotation provided two single-precision floating-point values `a` and `b`.
```javascript
var out = srotg( 0.0, 2.0 );
// returns [ 2.0, 1.0, 0.0, 1.0 ]
```
The function has the following parameters:
- **a**: rotational elimination parameter.
- **b**: rotational elimination parameter.
#### srotg.assign( a, b, out, stride, offset )
Constructs a Givens plane rotation provided two single-precision floating-point values `a` and `b` and assigns results to an output array.
```javascript
var Float32Array = require( '@stdlib/array-float32' );
var out = new Float32Array( 4 );
var y = srotg.assign( 0.0, 2.0, out, 1, 0 );
// returns [ 2.0, 1.0, 0.0, 1.0 ]
var bool = ( y === out );
// returns true
```
## Notes
- `srotg()` corresponds to the [BLAS][blas] level 1 function [`srotg`][srotg].
```javascript
var discreteUniform = require( '@stdlib/random-base-discrete-uniform' );
var srotg = require( '@stdlib/blas-base-srotg' );
var out;
var i;
for ( i = 0; i < 100; i++ ) {
out = srotg( discreteUniform( -5, 5 ), discreteUniform( -5, 5 ) );
console.log( out );
}
```
* * *
## Notice
This package is part of [stdlib][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][stdlib], see the main project [repository][stdlib].
#### Community
[![Chat][chat-image]][chat-url]
---
## License
See [LICENSE][stdlib-license].
## Copyright
Copyright © 2016-2025. The Stdlib [Authors][stdlib-authors].
[npm-image]: http://img.shields.io/npm/v/@stdlib/blas-base-srotg.svg
[npm-url]: https://npmjs.org/package/@stdlib/blas-base-srotg
[test-image]: https://github.com/stdlib-js/blas-base-srotg/actions/workflows/test.yml/badge.svg?branch=main
[test-url]: https://github.com/stdlib-js/blas-base-srotg/actions/workflows/test.yml?query=branch:main
[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/blas-base-srotg/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/blas-base-srotg?branch=main
[chat-image]: https://img.shields.io/gitter/room/stdlib-js/stdlib.svg
[chat-url]: https://app.gitter.im/#/room/#stdlib-js_stdlib:gitter.im
[stdlib]: https://github.com/stdlib-js/stdlib
[stdlib-authors]: https://github.com/stdlib-js/stdlib/graphs/contributors
[umd]: https://github.com/umdjs/umd
[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules
[deno-url]: https://github.com/stdlib-js/blas-base-srotg/tree/deno
[deno-readme]: https://github.com/stdlib-js/blas-base-srotg/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/blas-base-srotg/tree/umd
[umd-readme]: https://github.com/stdlib-js/blas-base-srotg/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/blas-base-srotg/tree/esm
[esm-readme]: https://github.com/stdlib-js/blas-base-srotg/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/blas-base-srotg/blob/main/branches.md
[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/blas-base-srotg/main/LICENSE
[blas]: http://www.netlib.org/blas
[srotg]: http://www.netlib.org/lapack/explore-html/df/d28/group__single__blas__level1.html