Chi-squared distribution median.
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> [Chi-squared][chisquare-distribution] distribution [median][median].
``bash`
npm install @stdlib/stats-base-dists-chisquare-median
`javascript`
var median = require( '@stdlib/stats-base-dists-chisquare-median' );
#### median( k )
Returns the [median][median] of a [chi-squared][chisquare-distribution] distribution with degrees of freedom k.
`javascript
var v = median( 9.0 );
// returns ~8.343
v = median( 2.0 );
// returns ~1.386
`
If provided k < 0, the function returns NaN.
`javascript`
var y = median( -1.0 );
// returns NaN
`javascript
var uniform = require( '@stdlib/random-array-uniform' );
var logEachMap = require( '@stdlib/console-log-each-map' );
var median = require( '@stdlib/stats-base-dists-chisquare-median' );
var opts = {
'dtype': 'float64'
};
var k = uniform( 10, 0.0, 20.0, opts );
logEachMap( 'k: %0.4f, Median(X;k): %0.4f', k, median );
`
*
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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---
See [LICENSE][stdlib-license].
Copyright © 2016-2026. The Stdlib [Authors][stdlib-authors].
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[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/stats-base-dists-chisquare-median/tree/deno
[deno-readme]: https://github.com/stdlib-js/stats-base-dists-chisquare-median/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/stats-base-dists-chisquare-median/tree/umd
[umd-readme]: https://github.com/stdlib-js/stats-base-dists-chisquare-median/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/stats-base-dists-chisquare-median/tree/esm
[esm-readme]: https://github.com/stdlib-js/stats-base-dists-chisquare-median/blob/esm/README.md
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[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/stats-base-dists-chisquare-median/main/LICENSE
[chisquare-distribution]: https://en.wikipedia.org/wiki/Chi-squared_distribution
[median]: https://en.wikipedia.org/wiki/Median