for a school project I have to map some data on a geographical map in R. Therefore I've got some data containing the zipcode and many other information (just no more information on the state, county or whatever). I've been trying to point out on a map of the usa first all the zips I have. Just dots. Afterwards I wanted to mix and match the criteria like the count of zips I have in the data (e.g. the zips that appear very often I wanted to colour dark and the less often ones in a lither colour, later I wanted to point out e.g. the number of churns in a state). Can somebody help me out on how I can do this?
thanks a lot