R is a language and environment for statistical computing and graphics
R provides a wide variety of statistical and graphical techniques, and is highly extensible(linear and nonlinear modelling, classical statistical tests, time-series analysis, classification, clustering, …)
One of R’s strengths is the ease with which well-designed publication-quality plots can be produced
Do you know what General Public License or GNU is?
You have the freedom to run the program as you wish, for any purpose (freedom 0).
You have the freedom to study how the program works, and change it so it does your computing as you wish (freedom 1).
You have the freedom to redistribute copies so you can help your neighbor (freedom 2).
You have the freedom to distribute copies of your modified versions to others (freedom 3).
