What Does R Mean?
R is a GNU-licensed free software programming language and software environment primarily used for statistical computing as well as for graphics. It is widely used by statisticians and data miners for creating or developing statistical and data analysis tools and software.
Techopedia Explains R
The R programming language provides a wide selection of graphical and statistical techniques such as linear and nonlinear modeling, classification, clustering, as well as classical statistical tests and many others. It is an extensible language, which allows the creation of new functions and extensions, such those being developed by the R community.