The Art of R Programming 原版PDF by Matloff

R is a scripting language for statistical data manipulation and analysis. It was inspired by, and is mostly compatible with, the statistical language S developed by AT&T. The name S, for statistics, was an allusion to another programming language with a one-letter name developed at AT&T—the famous C language. S later was sol d to a small firm, which added a graphical user interface (GUI) and named the result S-Plus. d to a small firm, which added a graphical user interface (GUI) and named the result S-Plus.