Date: 09/02/06 (PHP Community)    Keywords: php

I'm writing a little php app for which I'll need to be able to create a trendline from a set of data. Does anyone know of a free (preferably open source) library that can do such a thing in PHP?

Also, does anyone know of a library that I can use to work with matrices (the math kind) in PHP?
EDIT: I just ran across PEAR::Matrix. Have any of you used this with success (or not)?

Source: http://community.livejournal.com/php/491204.html