I am trying to overlay a nominal variable (2 categories - rainfed vs irrigated) in a choropleth map over a numeric variable. In order to highlight the difference in pattern among the two ...
I have created state and county choropleths in R using ggplot2. The method I have used for this came from Winston Chang's "R Graphics Cookbook". For those choropleths the map was already represented ...
I am working with US education data, and have been asked to create maps that overlay a measure of student poverty and academic achievement. Ideally, I would be able to do this by creating a choropleth ...
I have a question with regard to plotting a choropleth map. What is recommended with regard to plotting a map with custom breaks? And make it look a bit attractive. In my script I have used the ...