R

R

R is a programming language and software environment for statistical computing and graphics. It is an interpreted language with a simple syntax, and it is widely used among statisticians and data miners for developing statistical software and data analysis.

Key Features

• vectorized operations: most functions work on whole vectors and matrices, no explicit loops needed
• built-in data structures for statistics: vectors, factors, matrices, lists, and data frames
• rich collection of packages: base R plus thousands of user-contributed packages on CRAN
• publication-quality graphics: base plotting, lattice, and ggplot2
• interfaces to other languages: can call C, C++, and Fortran code, and there are bridges to databases and Hadoop

R on This Wiki

Many pages on this wiki use R for examples of statistical computations and plotting. For example:

• R Visualization Snippets — ready-to-use plotting code
• Summary Statistics — the summary function
• T-tests and Paired T-test — the t.test function
• ROC Analysis — the ROCR package
• Q-Q Plot, Bar Chart, Dot Plot, Mosaic Plot, Cumulative Gain Chart — plotting examples
• Sample Size Estimation — power calculations

See Also

• Statistics
• Machine Learning (coursera)