The Essential R Reference
Mark Gardener
Wiley
The cross-platform, open source language R provides powerful tools for data analysis and reporting, but its complexities can be a bit daunting. To use the built-in help system, you must know the command names  the vocabulary and grammar of R. This book contains more than 400 command names arranged by topic, with plenty of examples, related commands, and cross-references. It's the quintessential resource for R beginners and veterans alike.