Sign Up for Free

RunKit +

Try any Node.js package right in your browser

This is a playground to test code. It runs a full Node.js environment and already has all of npm’s 400,000 packages pre-installed, including gamma with all npm packages installed. Try it out:

var gamma = require("gamma")

This service is provided by RunKit and is not affiliated with npm, Inc or the package authors.

gamma v1.0.0

the gamma function (Γ)

gamma

gamma function in javascript using the lanczos approximation for small values and the spouge approximation for larger values

browser support

build status

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 do:

npm install gamma

kudos

Implementation transliterated from the python script on the wikipedia entry for the lanczos approximation.

Spouge approximation from Niggler.

license

MIT

Metadata

RunKit is a free, in-browser JavaScript dev environment for prototyping Node.js code, with every npm package installed. Sign up to share your code.
Sign Up for Free