I've installed Ghostscript and grImport in R (Windows, Rstudio). I'm following the tutorial but I immediately get the error, > library(grImport) Loading required package: grid Loading required...

I am trying to write a little utility function that will annotate my plots Reuben Fischer-Baum style with a nice little logo and url at the bottom - eg: I've figured out how to get a postsc...

I am trying to create a simple ggmap with a number of schools. I can easily get to the point where the schools show up as points on the map (code below). But, I would like to bring in an image of a...