Outline Contents Introduction ? R is an open source implementation of the S language, you may call it a free ?clone? of commercial statistical computing system S-plus. ? R is a high level scripting language (like MatLab and Python but unlike C and FORTRAN) which is easy to use. It is best suited for small (thousands of data points) to medium (under a million data points) sized data analysis. ? R is the de facto programming language among statisticians for developing statistical software. In recent years it has been gaining user base in other fields such as bioinformatics (via the BioConductor project), mathematical finance, medical imaging, and social sciences. R and R libraries