R 3.1.2 Description:
R is an open source, freely distributed and multiplatform command-line software that provides an integrated suite of software facilities, which can be easily used for data calculation, manipulation and graphical display. In other words, R is a programming language and environment for statistical computing and graphics. Itís a GNU project similar to the S programming language and development environment created by John Chambers and colleagues at Bell Laboratories, which was previously known as AT&T, now Lucent Technologies. It comes with comprehensive documentation that is available on the projectís homepage. Key features include an effective, well-developed and simple programming language, useful data storage and handling functions, a set of operators for array calculations, especially matrices, a coherent, large and integrated set of intermediate utilities for data analysis, as well as graphical functions for data display and analysis.