R tutorial: Just getting started with R? Here is a post on inspecting univariate data

If you are new to R, then perhaps a look at simple univariate data is a good place to start.  In this RPubs post, I take a look at both categorical and numerical data.  It is quite easy to calculate descriptive statistics of univariate data and to visualize it using plots.  Click the link and have a look.

By the way, the file is also available on GitHub.