npm package: @stdlib/array-logspace
Description: Generate a logarithmically spaced numeric array.
Author: The Stdlib Authors
Latest version: 0.2.3

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<details>
  <summary>
    About stdlib...
  </summary>
  <p>We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.</p>
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</details>

# Logspace

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

> Generate a logarithmically spaced numeric array.

<section class="installation">

## Installation

```bash
npm install @stdlib/array-logspace
```

</section>

<section class="usage">

## Usage

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

#### logspace( a, b\[, length] )

Generates a logarithmically spaced numeric `array` between `10^a` and `10^b`. If a `length` is not provided, the default output `array` length is `10`.

```javascript
var arr = logspace( 0, 2, 6 );
// returns [ 1, ~2.5, ~6.31, ~15.85, ~39.81, 100 ]
```

</section>

<!-- /.usage -->

<section class="notes">

## Notes

-   The output `array` includes the values `10^a` and `10^b`. **Beware** of floating point errors, including for the first and last `array` elements.

</section>

<!-- /.notes -->

<section class="examples">

## Examples

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

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

// Default behavior:
out = logspace( 0, 3 );
console.log( out.join( '\n' ) );

// Specify length:
out = logspace( 0, 3, 100 );
console.log( out.join( '\n' ) );

// Create an array with decremented values:
out = logspace( 3, 0, 10 );
console.log( out.join( '\n' ) );
```

</section>

<!-- /.examples -->

<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->

<section class="related">

* * *

## See Also

-   <span class="package-name">[`@stdlib/array-incrspace`][@stdlib/array/incrspace]</span><span class="delimiter">: </span><span class="description">generate a linearly spaced numeric array using a provided increment.</span>
-   <span class="package-name">[`@stdlib/array-linspace`][@stdlib/array/linspace]</span><span class="delimiter">: </span><span class="description">generate a linearly spaced array over a specified interval.</span>

</section>

<!-- /.related -->

<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->


<section class="main-repo" >

* * *

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

</section>

<!-- /.stdlib -->

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<section class="links">

[npm-image]: http://img.shields.io/npm/v/@stdlib/array-logspace.svg
[npm-url]: https://npmjs.org/package/@stdlib/array-logspace

[test-image]: https://github.com/stdlib-js/array-logspace/actions/workflows/test.yml/badge.svg?branch=v0.2.3
[test-url]: https://github.com/stdlib-js/array-logspace/actions/workflows/test.yml?query=branch:v0.2.3

[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/array-logspace/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/array-logspace?branch=main

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[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-logspace/tree/deno
[deno-readme]: https://github.com/stdlib-js/array-logspace/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/array-logspace/tree/umd
[umd-readme]: https://github.com/stdlib-js/array-logspace/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/array-logspace/tree/esm
[esm-readme]: https://github.com/stdlib-js/array-logspace/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/array-logspace/blob/main/branches.md

[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/array-logspace/main/LICENSE

<!-- <related-links> -->

[@stdlib/array/incrspace]: https://www.npmjs.com/package/@stdlib/array-incrspace

[@stdlib/array/linspace]: https://www.npmjs.com/package/@stdlib/array-linspace

<!-- </related-links> -->

</section>

<!-- /.links -->