The R Home Page Robert Gentleman and Ross Ihaka Department of Statistics University of Auckland 1.
R is a language and run-time environment for carrying out interactive statistical data analysis.
However, R is not S . In addition the software is still under development and is not yet in a fully mature and stable state. Having issued those warnings, R is available as Free Software under the terms of the Free Software Foundation's GNU General Public License . Where it can be obtained. The latest release of R is 0.61.1.