Other names may be trademarks of their respective owners. Milton, PhD, Clinical Assistant Professor, Biostatisticsīoston University School of Public Health Basic Statistical Analysis Using the R Statistical Package Introduction Basic Statistical Analysis Using the R Statistical Package R is a freely distributed software package for statistical analysis and graphics, developed and managed by the R Development Core Team.

R can be downloaded from the Internet site of the Comprehensive R Archive Network (CRAN) (). Check that you download the correct version of R for your operating system (for example, XP for the PC, Tiger or earlier versions of OSX for Macs). R is related to the S statistical language which is commercially available as S-PLUS. For our basic applications, matrices representing data sets (where columns represent different variables and rows represent different subjects) and column vectors representing variables (one value for each subject in a sample) are objects in R. For example, if 'cholesterol' was an object representing cholesterol levels from a sample, the function 'mean(cholesterol)' would calculate the mean cholesterol for the sample.įunctions in R perform calculations on objects. For our basic applications, results of an analysis are displayed on the screen.

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