npm package: @stdlib/ndarray-base-prepend-singleton-dimensions
Description: Prepend singleton dimensions.
Author: The Stdlib Authors
Latest version: 0.3.1

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# prependSingletonDimensions

[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] <!-- [![dependencies][dependencies-image]][dependencies-url] -->

> Prepend singleton dimensions.

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<section class="intro">

</section>

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<section class="installation">

## Installation

```bash
npm install @stdlib/ndarray-base-prepend-singleton-dimensions
```

</section>

<section class="usage">

## Usage

<!-- eslint-disable id-length -->

```javascript
var prependSingletonDimensions = require( '@stdlib/ndarray-base-prepend-singleton-dimensions' );
```

#### prependSingletonDimensions( x, n, writable )

Returns an ndarray with a specified number of prepended singleton dimensions (i.e., dimensions whose size is equal to `1`).

<!-- eslint-disable id-length -->

```javascript
var array = require( '@stdlib/ndarray-array' );

// Create a 2x2 ndarray:
var x = array( [ [ 1, 2 ], [ 3, 4 ] ] );
// returns <ndarray>[ [ 1, 2 ], [ 3, 4 ] ]

// Prepend singleton dimensions:
var y = prependSingletonDimensions( x, 3, false );
// returns <ndarray>[ [ [ [ 1, 2 ] ], [ [ 3, 4 ] ] ] ]
```

The function accepts the following arguments:

-   **x**: input ndarray.
-   **n**: number of singleton dimensions to prepend.
-   **writable**: boolean indicating whether a returned ndarray should be writable.

</section>

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<section class="examples">

## Examples

<!-- eslint-disable id-length -->

<!-- eslint no-undef: "error" -->

```javascript
var uniform = require( '@stdlib/random-uniform' );
var ndarray2array = require( '@stdlib/ndarray-to-array' );
var prependSingletonDimensions = require( '@stdlib/ndarray-base-prepend-singleton-dimensions' );

var x = uniform( [ 3, 3, 3 ], -10.0, 10.0 );
console.log( ndarray2array( x ) );

var y = prependSingletonDimensions( x, 3, false );
console.log( ndarray2array( y ) );
```

</section>

<!-- /.examples -->

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* * *

## 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].

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## License

See [LICENSE][stdlib-license].


## Copyright

Copyright &copy; 2016-2026. The Stdlib [Authors][stdlib-authors].

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