Notes on R

Documentation:

The R-project's intro: Introduction to R
(nice, but not everyone finds it the "user-friendly")

A short intro to R:  R_Handout  
(thanks to a student who contributed this)

Peter Rossi's intro to R: Rossi notes on R
(everything Rossi writes is good!)

My MBA data-mining lecture notes on R:
   Plots Tables and Trees (in R)  (don't read the part on Trees)
   More on R

Script for learning R: learn_R.R