@stdlib/stats-base-dists-chi NPM

Chi

Chi distribution.

Installation

npm install @stdlib/stats-base-dists-chi

Usage

var chi = require( '@stdlib/stats-base-dists-chi' );

chi

Chi distribution.

var dist = chi;
// returns {...}

The namespace contains the following distribution functions:

cdf( x, k ): Chi distribution cumulative distribution function.
logpdf( x, k ): evaluate the natural logarithm of the probability density function (PDF) for a chi distribution .
pdf( x, k ): Chi distribution probability density function (PDF).
quantile( p, k ): Chi distribution quantile function.

The namespace contains the following functions for calculating distribution properties:

entropy( k ): Chi distribution differential entropy.
kurtosis( k ): Chi distribution excess kurtosis.
mean( k ): Chi distribution expected value.
mode( k ): Chi distribution mode.
skewness( k ): Chi distribution skewness.
stdev( k ): Chi distribution standard deviation.
variance( k ): Chi distribution variance.

The namespace contains a constructor function for creating a Chi distribution object.

Chi( [k] ): Chi distribution constructor.

var Chi = require( '@stdlib/stats-base-dists-chi' ).Chi;

var dist = new Chi( 4.0 );

var mu = dist.mean;
// returns ~1.88

Examples

var objectKeys = require( '@stdlib/utils-keys' );
var chi = require( '@stdlib/stats-base-dists-chi' );

console.log( objectKeys( chi ) );

Notice

This package is part of 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, see the main project repository.