[Rd] Re: Calling R functions from Java

D0c kanglin at gmail.com
Tue May 3 06:00:04 CEST 2005

Thanks Simon, say i was to use  JRI / SJava instead, could you give
some examples of how i would implement showing a plot() in java on a
windows machine?

On 5/2/05, Simon Urbanek <simon.urbanek at r-project.org> wrote:
> On May 2, 2005, at 2:55 AM, D0c wrote:
> > Hey guys thanks for the help. I found Rserve to be a solution i can
> > work with. i'll just use the JRClient to connect to Rserve. However
> > i have another problem. How can i get a nice graph from Rserve
> > using JRCLient using the plot() function?
> There are several ways - you can use one of the R devices (e.g. jpeg/
> png, pdf or GDD) to create a file and then transport it to the client
> using Rconnection.openFile (or use it locally depending on your
> setup) or you can use one of the special devices to plot directly -
> xGD or JavaGD.
> > Or for that matter a simple summary() of a dataset to be printed on
> > screen (eg JOptionPane)?
> Something like
> String s = c.eval("paste(capture.output(summary
> (data)),collapse='\n')").asString();
> then add the string to whatever widget you want ... Maybe a better
> place for discussing Rserve is http://www.rosuda.org/lists.shtml
> If you don't need the client/server separation you may consider JRI
> (as used by JGR) or SJava (from Omegahat) instead - both embed R into
> Java directly i.e. you have only one process running. JRI works
> nicely with rJava and JavaGD so you have a native Java graphics
> device that you can embed in your AWT/Swing windows. Rserve is better
> for applications with several clients such as web servers. SJava is
> more general, but is not easy to setup on non-unix platforms (your
> mileage may vary).
> Cheers,
> Simon

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