plotting pie graphs on map in ggplot

Question

This may be a wish list thing, not sure (i.e. maybe there would need to be the creation of geom_pie for this to occur). I saw a map today (LINK) with pie graph

Answer 1

I stumbled upon what looks like a function to do this: "add.pie" in the "mapplots" package.

The example from the package is below.

plot(NA,NA, xlim=c(-1,1), ylim=c(-1,1) )
add.pie(z=rpois(6,10), x=-0.5, y=0.5, radius=0.5)
add.pie(z=rpois(4,10), x=0.5, y=-0.5, radius=0.3)