These three courses make use of the free and open source R, which is a statistical computing language that gives you a lot of bang for the buck in terms of visualization. I mostly use base R, which is a factoid you can ignore if that means nothing to you.
Basics. Then work your way up to more advanced methods.
This four-week course walks you through the essentials of visualizing data in R. Familiarize yourself with the language, quickly make plots, and build your own. Exercises at the end of each section help you hone your skills.
See and find the changes in your data.
Everything you need to know to see and show patterns over time, from basic chart types to the more advanced.
Make maps that allow you to see spatial patterns across regions and are great for presentation and communication.
There are many ways to map geographic data in R, and with all the packages available, it can seem like a hodgepodge of items with no clear spot to begin. This doesn’t have to be the case.