问题 Have a Question on Mapping with R, specifically around the choropleth maps in R. I have a dataset of ZIP codes assigned to an are and some associated data (dataset is here). My final data format is: Area ID, ZIP, Probability Value, Customer Count, Area Probability and Area Customer Total. I am attempting to present this data by plotting area probability and Area Customer Total on a Map. I have tried to do this by using the census TIGER Shapefiles but I guess R cannot handle the complete