R is a popular statistical software package, primarily because it is freely available at www.r-project.org. As a result, many instructors as well as many of the more sophisticated statistical practitioners are switching to it. We have found that using R makes sense with graduate students who are already familiar with statistical methodology, especially those students with some experience using more sophisticated statistical software packages such as SAS. We personally recommend using less sophisticated and fully supported statistical software packages such as Minitab and SAS-JMP for undergraduates and those new to formal statistical analysis. However, we realize that some instructors prefer to use R even for these less sophisticated students. As a result, we created this appendix to introduce some of the basics of R.
According to the project's webpage: