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inv-chisquare-cdf

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Inverse chi-squared cumulative distribution function

github.com/zetos/inv-chisquare-cdf

zetos/inv-chisquare-cdf

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# Inverse Chi-squared cumulative distribution function [![Build Status](https://travis-ci.org/zetos/inv-chisquare-cdf.svg?branch=master)](https://travis-ci.org/zetos/inv-chisquare-cdf) [![Coverage Status](https://coveralls.io/repos/github/zetos/inv-chisquare-cdf/badge.svg?branch=master)](https://coveralls.io/github/zetos/inv-chisquare-cdf?branch=master) **inv-chisquare-cdf** is an alternative implementation of the `jStat.chisquare.inv` in the *jStat* package using ES6. ## Install `$ npm install --save inv-chisquare-cdf` ## Functions * `invChiSquareCDF(probability, degreeOfFreedom)` Returns the inverse chi-square cdf with "degreeOfFreedom" for the "probability" using the Lanczos approximation. * `invRegLowGamma(p, a)` Returns the inverse of the lower regularized incomplete Gamma function evaluated at (p,a). * `regLowGamma(a, x)` Returns the lower regularized incomplete gamma function evaluated at (a,x). * `logGamma(x)` Returns the logarithm of the gamma function ## Bibliography * [jStat](https://github.com/jstat/jstat) * [Lanczos approximation](https://en.wikipedia.org/wiki/Lanczos_approximation) * [Inverse-chi-squared distribution](https://en.wikipedia.org/wiki/Inverse-chi-squared_distribution)