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.
The R Project for Statistical Computing (or just R for short) is a powerful data analysis tool. It
is both a programming language and a computational and graphical environment.
R is free, open source software made available under the GNU General Public License. It runs
on Mac, Windows, and Unix operating systems.
R website is : http://www.r-project.org
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