Java interface to R

I have been doing some programming with java servlets for data
collection.
I was wondering if there is a way to connect to the R-server using java
to do data analysis. A java-interface or some connection class.
I think there is some similar facility with SAS, although I have not
looked at it.

Richard Piper

To try and answer my own question. It does seem to possible to 
connect to the R process as follows:

	Process p  = Runtime.getRuntime().exec("R --slave");

	OutputStreamWriter o = new OutputStreamWriter(p.getOutputStream());
	o.write("data(sleep)\n");
	o.write("summary(sleep$extra)\n");
	o.write("mean(sleep$extra)\n");
	o.write("quit(\"no\")\n");
	o.flush(); 


        BufferedInputStream buffer =
          new BufferedInputStream(p.getInputStream());
        DataInputStream commandResult =
          new DataInputStream(buffer);
 etc ..

It seems to work quite well with limited testing


Richard

Intensive Care Unit, RNS Hospital, Sydney.
Phone:	612-9926-8656 or 8617
FAX:	612-9439-8418
Page:	612-9962-9000 No. 248026
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._