Student's t distribution in JavaScript for Google Spreadsheet

Question

Google Spreadsheets currently does not support the standard function TDIST - i.e. the Student's t-distribution. This function is critical for calculating p-values.

It seems that this is related to the fact that no integral-using functions (AFAICT) are implemented either.

However, Google Docs allows people to add and publish their own scripts, in JavaScript.

So ideally we should have something like:

function tdist(t_value, degrees_of_freedom, two_tailed [defaults true]) {...}

Anyone know of either an extant implementation of this (my google-fu has not turned up one, but may be weaker than yours) or a good idea for how to do it?

I'd like to publish this together with some other useful functions that are currently calculable but a bit of a pain (like Student's t-test itself).

Thanks!

Answer 1

Here you go.

Answer 2

http://www.math.ucla.edu/~tom/distributions/tDist.html - view source.