I have found this [site] (http://www.cookbook-r.com/ http://www.cookbook-r.com/) to be more helpful (plus the online documentation for ggplot2 which is really g

I have found this [site] (http://www.cookbook-r.com/ http://www.cookbook-r.com/) to be more helpful (plus the online documentation for ggplot2 which is really good). Hadley's book is really good and a solid treatment (from the author of so many clear, powerful package it's not a surprise), but there have been a lot of changes to ggplot2 since 2009. I have personally found ggplot2 to be so powerful because it lends itself very well to actually learning through using Cookbook-style examples.