​http://www.r-project.org/

Introduction

R is a language and environment for statistical computing and graphics. It is a GNU project which is similar to the S language and environment which was developed at Bell Laboratories (formerly AT&T, now Lucent Technologies) by John Chambers and colleagues. R can be considered as a different implementation of S. There are some important differences, but much code written for S runs unaltered under R.
R 是一種用在統計計算及繪圖的語言及環境，它是 GNU project，且非常類似 S 語言，它由 Bell Laboratories 開發。你可以載它想像成只是 S 不一樣的實作方法。它和 S 有些重大的不同，但大多數可以由 S 寫的程式碼依舊能在 R 上執行。

R provides a wide variety of statistical (linear and nonlinear modelling, classical statistical tests, time-series analysis, classification, clustering, ...) and graphical techniques, and is highly extensible. The S language is often the vehicle of choice for research in statistical methodology, and R provides an Open Source route to participation in that activity. R 提供了多種統計的 (線性及非線性模組，典型的統計測試，時間序列分析，分數，群) 和繪圖的技術，並且具高度可擴充性。S 語言是一種用在統計方法研究的選擇，R 提供一個開放源碼來參與此活動