I am working with the radon dataset from
data("radon", package = "rstanarm")
I have seen some tutorials with tm_shape but it seems like it only has country level maps.
How can I most efficiently create a heatmap if I have a matrix with 2 colomns:
1 with the county names and 1 with the average radon level?
You don't have to do it for me but I'm very thankful if somebody could hint me atleast to a package or tutorial.
Thanks in advance.