R is an integrated environment for doing statistical and data analysis. It was created by Ross Ihaka and Robert Gentleman at the University of Auckland, New Zealand in the 1990s and is now maintained by the R Development Core Team. It has excellent data handling capabilities and can construct production quality graphics. The R language is an object-oriented, interpreted language that allows the user to employ loops, branching and functional definitions so there is a considerable level of program control. R is an open source version of S, a widely respected statistical package, written in a mixture of Fortran, C and R. It is freely available under the GNU GPL license and will run on Linux, MAC and Windows operating systems. It can be downloaded and installed locally from www.r-project.org.

R compares favorably with MATLAB; they both support matrix arithmetic and are similar in performance. Like MATLAB, commands can saved to a script file and run either interactively or in batch mode.

The base R distribution contains most common statistical procedures, including regression and ANOVA, linear and nonlinear modeling, classical parametric and nonparametric tests, cluster analysis, and time series analysis. One of the most important strengths of R is the over 5000 contributed packages that are freely downloadable from the CRAN site.

Linda Woodard

Cornell Center for Advanced Computing

July 2014

With contributions from:

David Walling and Weijia Xu

Texas Advanced Computing Center