I'm trying to use run-program to set up a simple interface to the
statistical language R. I just want to send text commands to an R
process, maybe read some results back as text, make some graphics,
etc.
I'm starting R using:
(defparameter *e* (extensions:run-program "/home/rif/Software/R/bin/R" '("--no-save")
:pty t :wait nil :input :stream :output
:stream :error :output))
The process starts OK. I can use the process-output slot to read all
the things R normally prints out at startup time.
I'd like to be able to make R plot by saying
* (write-line "plot(rnorm(3000))" (extensions:process-input *e*))
"plot(rnorm(3000))"
* (finish-output (extensions:process-input *e*))
NIL
*
but this has no effect. I have one idea that may be related to the
problem. If I run R without the --no-save option, it fails
immediately. Looking at the internals of R, it appears that it runs
R_interactive = isatty(0);
and that for the process started from CMUCL, this is returning 0, so
it doesn't believe it's in an interactive R process. I'm guessing
this relates to the problem, but I'm not sure how to proceed. This
could be more of an R issue than a CMUCL issue, but any advice or
suggestions people can offer will be appreciated.
Cheers,
rif
