Just a quick note on how to call ggplot2 from Clojure. Install the rincanter package. A tip: if you don't know what R_HOME is for your system, try this at the R prompt:
> R.home(component="home")  "/usr/lib64/R" >
So I did
export R_HOME=/usr/lib64/R and then rincanter was happy.
When calling qplot, do not use
r-eval because this tries to convert the entire plot into a Clojure object, resulting in unmanageable output. Use
I worked out the right commands by copying one of the answers to this stackoverflow question.