Feel free to try the exercises below at your leisure. Solutions will be posted later in the week!
Using the Texas unemployment figures here,
create a choropleth of Texas counties in ggplot2 where
darker filled counties represent higher unemployment rates. (Texas
county shapefile downloadable from the Census Bureau here.)
(If you want to challenge yourself, try also replicating this map in
leaflet!)
Create a bubble map of U.S.
states (excluding AK and HI) with a point at each state’s centroid
sized proportionally to the number
of airports in each state. (Hint: sf::st_centroid
or rgeos::gCentroid might be helpful here.)