How to Make Line Charts in R
Learn to draw lines wherever and however you want, and you’ve got yourself some flexibility.
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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.
How to Make Gridded Maps
For when your geographic data is evenly spread rather than aggregated by government boundaries.
A Variety of Area Charts with R
From the basic area chart, to the stacked version, to the streamgraph, the geometry is similar. Once you know how to do one, you can do them all.