# gamma [gamma function](http://en.wikipedia.org/wiki/Gamma_function) in javascript using the [lanczos approximation](http://en.wikipedia.org/wiki/Lanczos_approximation) for small values and the [spouge approximation](https://en.wikipedia.org/wiki/Spouge's_approximation) for larger values [![browser support](http://ci.testling.com/substack/gamma.js.png)](http://ci.testling.com/substack/gamma.js) [![build status](https://secure.travis-ci.org/substack/gamma.js.png)](http://travis-ci.org/substack/gamma.js) # example ``` > var gamma = require('gamma') > gamma(5) 23.999999999999996 > gamma(1.6) 0.8935153492876909 ``` # methods var gamma = require('gamma') ## gamma(z) Return the gamma function over `z`. Complex numbers aren't supported, only reals. ## gamma.log(z) Return the natural log of the gamma function for `z`. This function is used internally by the spouge approximation to compute large values. # install With [npm](http://npmjs.org) do: ``` npm install gamma ``` # kudos Implementation transliterated from the python script on the wikipedia entry for the [lanczos approximation](http://en.wikipedia.org/wiki/Lanczos_approximation). Spouge approximation from [Niggler](https://github.com/Niggler). # license MIT