R is a programming language and software environment for statistical computing and graphics, called "The R Project for Statistical Computing."
The R language is widely used among statisticians and data miners for developing statistical software and data analysis. Polls, surveys of data miners, and studies of scholarly literature databases show that R's popularity has increased substantially in recent years.
On this environment you will find the R interpreter. To start R type the following command into you terminal
For more information about R visit www.r-project.org