The R Manuals

On the website, manuals can be downloaded as PDF files, EPUB files, or browsed as HTML

An Introduction to R is based on the former "Notes on R", gives an introduction to the language and how to use R for doing statistical analysis and graphics. R Data Import/Export describes the import and export facilities available either in R itself or via packages which are available from CRAN. R Installation and Administration Writing R Extensions covers how to create your own packages, write R help files, and the foreign language (C, C++, Fortran, ...) interfaces. A draft of The R language definition documents the language per se. That is, the objects that it works on, and the details of the expression evaluation process, which are useful to know when programming R functions. R Internals: a guide to the internal structures of R and coding standards for the core team working on R itself. The R Reference Index: contains all help files of the R standard and recommended packages in printable form.