### Data Geeks!

Feb. 5th, 2013 04:04 pmDownload R (for free!) here:

http://cran.r-project.org

The tutorial is here:

http://tryr.codeschool.com

(You can try the tutorial without downloading the package)

Also I recommend SimpleR as a good free reference. For anyone who's ever looked at a data set and said, "If only I could plot it that way..."

ETA: I should also say, that for any spot where they use the arrow assignment '<-', you can also just use the equal sign '='