R is a system for statistical computation and graphics developed initially by Ross Ihaka and Robert Gentleman at the Department of Statistics of the University of Auckland in Auckland, New Zealand Ihaka and Gentleman (1996). It can be regarded as an Open Source implementation of the S language which in turn underlies the S-Plus software.
R offers facilities for data manipulation, calculation and graphical display either through build-in functions or add-on packages contributed by users.
It is distributed freely under the GNU General Public License www.gnu.org/copyleft/gpl.html and can be used for commercial purposes. The latest version and documentation can be obtained via CRAN, the Comprehensive R Archive Network http://cran.r-project.org.
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