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")
[1] "/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 r-eval-raw instead.
https://gist.github.com/1124157
; http://carlo-hamalainen.net/blog/2011/08/04/ggplot2-from-clojure
; To dump the plot to a file:
(use '(com.evocomputing rincanter)) ; https://github.com/jolby/rincanter
(r-eval "library(ggplot2)")
(r-eval-raw "qplot(rating, data=movies, geom=\"histogram\")") ; see http://had.co.nz/ggplot2/geom_histogram.html
(r-eval "ggsave('histogram-example.png')")
; To display on your screen (Unix example; see rincanter docs for alternatives to x11() call)
(use '(com.evocomputing rincanter))
(r-eval "x11()")
(r-eval "library(ggplot2)")
(r-eval-raw "p = qplot(rating, data=movies, geom=\"histogram\")")
(r-eval-raw "print(p)")
I worked out the right commands by copying one of the answers to this stackoverflow question.