On 2/19/2015 8:06 AM, Barry Rowlingson wrote:
> On Wed, Feb 18, 2015 at 11:44 AM, Mittal Ashra via R-help
> <r-help@r-project.org> wrote:
>> Dear All,
>> Apologies for mailing it to the whole crowd. This is Mittal, presently
>> working in a Project where we have build a platform for displaying
>> recommendations and the results are based on the statistical models.
>> I have gone through the CRAN repository to look out for an package which
>> converts the R code into an JAVA API and that can be called from the
>> platform. However, did not find any. If anyone can guide me to the right
>> package that will be grateful.
>> The packages can be similar to DeployR from Revolution Analytics.
> I doubt there's anything smart enough to take a set of R functions
> and magically create all the necessary Java boilerplate code that
> constitutes an implementation of an API in Java (cynics would say Java
> was all boilerplate...).
>
> There's the rJava package, which includes the JRI system for calling
> R from Java. Then your java can kick off an R "engine" and do R stuff:
I thought rJava called java from R not the other way around.
Description: Low-level interface to Java VM very much like .C/.Call and
friends. Allows creation of objects, calling methods and accessing fields.
>
> [boilerplate code deleted]
>
> Rengine re=new Rengine(args, false, new TextConsole());
>
> [more deleted boilerplate]
>
> re.eval("data(iris)",false);
>
> What you would have to do would be to write the Java
> functions/methods/classes with the appropriate arguments for your API
> and make them call the R code this way.
>
> I think RCaller is another way of doing this from Java - its not on
> CRAN since its not an R package, its a Java library.
>
> Barry
>
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--
Robert W. Baer, Ph.D.
Professor of Physiology
Kirksville College of Osteopathic Medicine
A T Still University of Health Sciences
800 W. Jefferson St
Kirksville, MO 63501
rbaer(at)atsu.edu
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