Small Multiples in R
Make a lot of charts at once, line them up in a grid, and you can make quick comparisons across several categories.
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How to Make Dot Density Maps in R
Choropleth maps are useful to show values for areas on a map, but they can be limited. In contrast, dot density maps are sometimes better for showing distributions within regions.
How to Make a Bump Chart in R
Visualize rankings over time instead of absolute values to focus on order instead of the magnitude of change.
Mapping With Shapefiles in R – Getting Started
Geographic data is often available as a shapefile, and there’s plenty of heavy software to get that data in a map. R is an open source option, and as a bonus, much of the work can be done in a few lines of code.