Choropleth Maps and Shapefiles in R
Fill those empty polygons with color, based on shapefile or external data.
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Drawing Circles and Ellipses in R
Whether you use circles as visual encodings or as a way to highlight areas of a plot, there are functions at your disposal.
3-D Printing: How to Prepare the Data in R
Moving your data from the digital screen to something more physical isn’t as tricky as it seems. Here’s how I did it.
R Cheat Sheet and Guide for Graphical Parameters
You can customize graphics in R with
par(), but the docs are mostly text and just organized alphabetically. Here is a more visual reference, categorized by what you can change. Plus, a one-page printout.