I'm using plotrix in R to plot a state level map of the US. It has an excellent function floating.pie to put pie charts on each state.

I'm wondering if there are similar functions within the plotrix package to display bar charts in each state? (I took a look at the documentation and the functions that deal with bar charts don't seem to have this possibility, but I just wanted to be sure.) I prefer to work within the plotrix package if possible, but feel free to name other packages.

As an example, I would be interested in producing a map similar to this (but for the US):

For my US map, there would be 50 bar charts, one for each state.

I got this map from https://stackoverflow.com/questions/20465070/barplots-on-a-map, but it seems that ggsubplot doesn't work on my version of R (similar to what others have been saying on the post).