Java-R integration?
I have successfully used two alternatives in the past.
- Pros: probably better performance.
- Cons: you have to configure some environment variables and libraries, different in Win/UNIX.
- Pros: easy to setup, you don't need to initialize R or link againstany R library, can run in a different machine.
- Cons: based on TCP/IP (a server is running), no callbacks from R.
Other alternatives I have never used : RCaller
There has been work by Duncan Temple Lang: http://rss.acs.unt.edu/Rdoc/library/SJava/Docs/RFromJava.pdf .
My guess as to the most robust solution would be JGR. The developers of JGR have a mailing list, Stats-Rosuda and the mailing list Archive indicates the list remains active as of 2013.
There is also code that has been put up at Googlecode, with an example here:http://stdioe.blogspot.com/2011/07/rcaller-20-calling-r-from-java.html
This is an old question.. but for anyone browsing through here that is still interested: I wrote a blog article that provides a detailed example of how to use JRI/rjava (a JNI based bridge) to do this type of thing (the how-to is focused on Linux dev environments). I also compare and contrast alternative approaches for doing 'mathy' stuff by calling out to R and similar frameworks.
URL > http://buildlackey.com/integrating-r-and-java-with-jrirjava-a-jni-based-bridge/