This repository contains the notes for a short course on R that I taught (under the auspices of the star lab) to first-year PhD students in political science at the University of Rochester.
The notes are available in PDF format at this link.
The notes are licensed under a
Creative Commons Attribution license,
which allows you to share and modify them as long as you attribute this work.
The notes draw some material from
Jonathan Olmsted's version of the course.
I also recommend taking a look at
Peter Haschke's version of
the course, which has some very nice examples of data visualization with
ggplot2.