One of the reasons to use R for analysis and visualization is the rich ecosystem of ‘packages’ contributed by others. In most cases, just as with smartphones, “There’s a package for that.” If you want to be efficient you need to embrace other people’s work and in the case of R that means installing packages.  This post walks you through the basics of package installation and use and gives some tips on workarounds when a package won’t install.

GNU PSPP is a program for statistical analysis of sampled data. It is a Free replacement for the proprietary program SPSS, and appears very similar to it with a few exceptions.