Stirling’s formula for R

I am sure it is out there but for my record keeping purposes and for anyone interested here is a quick function to find Stirling’s approximation of all possible permutations

Stirling<- function (n)((2*pi*n)^.5)*(n/exp(1))^n

Created by Pretty R at inside-R.org

Advertisements

About Philip Parker

I am a post doc in developmental and educational psychology at a Germany university. I did my PhD at the university of Sydney in stress and well-being. Most days I am hunched over a computer yelling at statistical software or responding to journal editors who seem to always want twice the amount of content but with half the words. For fun I like to read up on the latest developments in R and programming various functions.
This entry was posted in Uncategorized. Bookmark the permalink.

One Response to Stirling’s formula for R

  1. peeves says:

    Thank you! I’ve been looking for this for a while.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s