Functions in R perform calculations on objects. 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. R is related to the S statistical language which is commercially available as S-PLUS. 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 can be downloaded from the Internet site of the Comprehensive R Archive Network (CRAN) (). R is a freely distributed software package for statistical analysis and graphics, developed and managed by the R Development Core Team. 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