https://github.com/stdlib-js/array-base-ones2d
Create a two-dimensional nested array filled with ones.
https://github.com/stdlib-js/array-base-ones2d
2d alloc allocate array data fill filled generic javascript matrix multidimensional ndarray node node-js nodejs ones stdlib strided structure types
Last synced: 8 months ago
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Create a two-dimensional nested array filled with ones.
- Host: GitHub
- URL: https://github.com/stdlib-js/array-base-ones2d
- Owner: stdlib-js
- License: apache-2.0
- Created: 2023-08-10T07:24:22.000Z (over 2 years ago)
- Default Branch: main
- Last Pushed: 2025-02-24T00:29:58.000Z (10 months ago)
- Last Synced: 2025-04-12T14:24:40.590Z (9 months ago)
- Topics: 2d, alloc, allocate, array, data, fill, filled, generic, javascript, matrix, multidimensional, ndarray, node, node-js, nodejs, ones, stdlib, strided, structure, types
- Language: JavaScript
- Homepage: https://github.com/stdlib-js/stdlib
- Size: 245 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
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# ones2d
[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url]
> Create a two-dimensional nested array filled with ones.
## Installation
```bash
npm install @stdlib/array-base-ones2d
```
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 ones2d = require( '@stdlib/array-base-ones2d' );
```
#### ones2d( shape )
Returns a two-dimensional nested array filled with ones.
```javascript
var out = ones2d( [ 2, 3 ] );
// returns [ [ 1.0, 1.0, 1.0 ], [ 1.0, 1.0, 1.0 ] ]
```
## Examples
```javascript
var gscal = require( '@stdlib/blas-base-gscal' );
var ones2d = require( '@stdlib/array-base-ones2d' );
// Create a ones-filled array:
var arr = ones2d( [ 5, 10 ] );
// Scale element values...
gscal( arr[ 0 ].length, 2.0, arr[ 0 ], 1 );
gscal( arr[ 1 ].length, 3.0, arr[ 1 ], 1 );
gscal( arr[ 2 ].length, 4.0, arr[ 2 ], 1 );
gscal( arr[ 3 ].length, 5.0, arr[ 3 ], 1 );
gscal( arr[ 4 ].length, 6.0, arr[ 4 ], 1 );
console.log( arr );
// => [ [ 2.0, 2.0, ... ], [ 3.0, 3.0, ... ], [ 4.0, 4.0, ... ], [ 5.0, 5.0, ... ], [ 6.0, 6.0, ... ] ]
```
* * *
## See Also
- [`@stdlib/array-base/zeros2d`][@stdlib/array/base/zeros2d]: create a zero-filled two-dimensional nested array.
- [`@stdlib/array-base/ones`][@stdlib/array/base/ones]: create a generic array filled with ones.
- [`@stdlib/array-base/ones3d`][@stdlib/array/base/ones3d]: create a three-dimensional nested array filled with ones.
- [`@stdlib/array-base/ones4d`][@stdlib/array/base/ones4d]: create a four-dimensional nested array filled with ones.
- [`@stdlib/array-base/ones5d`][@stdlib/array/base/ones5d]: create a five-dimensional nested array filled with ones.
- [`@stdlib/array-base/onesnd`][@stdlib/array/base/onesnd]: create an n-dimensional nested array filled with ones.
* * *
## 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/array-base-ones2d.svg
[npm-url]: https://npmjs.org/package/@stdlib/array-base-ones2d
[test-image]: https://github.com/stdlib-js/array-base-ones2d/actions/workflows/test.yml/badge.svg?branch=main
[test-url]: https://github.com/stdlib-js/array-base-ones2d/actions/workflows/test.yml?query=branch:main
[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/array-base-ones2d/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/array-base-ones2d?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/array-base-ones2d/tree/deno
[deno-readme]: https://github.com/stdlib-js/array-base-ones2d/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/array-base-ones2d/tree/umd
[umd-readme]: https://github.com/stdlib-js/array-base-ones2d/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/array-base-ones2d/tree/esm
[esm-readme]: https://github.com/stdlib-js/array-base-ones2d/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/array-base-ones2d/blob/main/branches.md
[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/array-base-ones2d/main/LICENSE
[@stdlib/array/base/zeros2d]: https://github.com/stdlib-js/array-base-zeros2d
[@stdlib/array/base/ones]: https://github.com/stdlib-js/array-base-ones
[@stdlib/array/base/ones3d]: https://github.com/stdlib-js/array-base-ones3d
[@stdlib/array/base/ones4d]: https://github.com/stdlib-js/array-base-ones4d
[@stdlib/array/base/ones5d]: https://github.com/stdlib-js/array-base-ones5d
[@stdlib/array/base/onesnd]: https://github.com/stdlib-js/array-base-onesnd