R or GNU S is a highly sophisticated and high quality computer environment for doing statistical data analysis and research. R is very similar to S and Splus which are used worldwide by the majority of active researchers in statistics. Official Short Description of R.

R is a scripting language. It is very easy to write simple programs or functions in R. R programs can be debugged quickly. R is free under the terms of a standard GNU license.

In addition to its excellence as a scripting language for simple programs, R's other outstanding features are:

the excellence of its computer graphics for data analysis; | |

high quality base functions for analysis of variance, linear models, generalized linear models; | |

numerous state-of-the-art statistical libraries contributed by leading researchers in statistics. |

Extensive documentation, source code and binary executables can be downloaded from the R homepage: http://cran.us.r-project.org/.