This repository includes the code used to produce the map featured in the "Accessing data from the American Community Survey in R using the Census API, and producing a map. It includes code to produce a map of percent non-citizen population by county for Pennsylvania.
It also contains a code in which you can "fill in the blanks". This code will allow you to produce a map for a state and variable of interest. I have included detailed comments on this code on where to obtain the information required to "fill in the blanks".
If you have any question please create and issue and I will answer as soon as it is possible.
Alexis R. Santos