R is an elegant and comprehensive statistical and graphical programming language. Unfortunately, it can also have a steep learning curve. I created this website for both current R users, and experienced users of other statistical packages (e.g., SAS, SPSS, Stata) who would like to transition to R. My goal is to help you quickly access this language in your work.
Источник: Quick-R: Home Page
Книга недавно вышла на русском языке http://dmkpress.com/catalog/computer/programming/978-5-94074-912-7/