Re: [udig-devel] to R or not to R

["Dan Putler" <dan.putler@xxxxxxxxxxxxx>]

Here is the link to R-QGIS plug-in:
http://www.maths.lancs.ac.uk/~rowlings/Software/Spqr/

Dan

On Thu, 2007-11-10 at 10:33 -0700, Dan Putler wrote:
> Hi Andrea,
> 
> In terms of your original question, R integration with uDig is huge,
> particularly for those who want to use uDig as a research tool.
> 
> In terms of actually doing it, Adrian and the CGIAR have worked the most
> with this. I know Adrian's goal has been to use R's JRI package, while
> the CGIAR team use R's RServe package. RServe seems to be clunky, while
> the use of JRI also has complications (under Linux you can't use a
> binary package of R, instead you have to compile from source to give JRI
> the hooks it needs into R).
> 
> Looking over the StatET site, it appears that it uses neither of these
> two approaches. Instead, it uses connector code that is OS specific.
> Under Windows it uses Microsoft .NET-Runtime, while under Unix-like OSs
> the connector is a Perl script that starts an instance of R, which, in
> turn, listens on a pipe that Eclipse sends code to. Not pretty, but
> possible. What comes back to Eclipse in StatET is text output. I'm not
> sure what will happen if you try to send an sp class object back to uDig
> from R this way. What might work better is to convert the sp class
> object to a shapefile (via the R maptools package) or other appropriate
> file type (likely using the Rgdal package), and then have uDig read that
> file in for display purposes.
> 
> To up the competitive juices, there seems to be progress in creating a
> connector between QGIS and R using QGIS's new Python scripting ability
> and the Rpy package.
> 
> Dan
> 
> On Thu, 2007-11-10 at 18:42 +0200, Andrea Antonello wrote:
> > > > Super interesting stuff.  Have you actually tried either of
> > > > these? How Statet integrates their R.  Do they have some JNI or
> > > > something?   
> > > 
> > > I'm not sure, on a first very quick review I couldn't understand it,
> > > I hoped that someone on the list had tried it :)
> > > The python interface looks very nice. I'm just not sure if it will
> > > work in jython, because I never gave a look at that. Will it wrap the
> > > installed pyhton and there fore have all the packages? Is it a
> > > straight implementation? I will have to give it a look :)
> > 
> > Alright, I gave it a quick look and it seams that jython is not the way
> > to get to R. Jython is a 100% java implementation of python and
> > not wrapped on top of it. I would like to cry... i thought I found an
> > easy way :)
> > 
> > The search goes on... an on...
> > Andrea
> > 
> > 
> > > 
> > > > Can you make use of their console somehow?  how does it compare to  
> > > > what you have?  Just curious.
> > > 
> > > No, I don't thinks so. Our goal is that to mix up some languages in
> > > order to interact "spatially" with each other. So for example I could
> > > create some raster maps throught grass or jgrass algorithms and then
> > > on the generated maps I would want to do some R analysis. Or inverse
> > > for example do a Kriging through R (ex. from a point layer in a
> > > database), which then writes a GRASS raster, and then access it with
> > > grass/jgrass commands. This forces us to stay inside our editor and
> > > console, in order to be able to follow the whole workflow.
> > > 
> > > Andrea
> > > 
> > > > 
> > > > Jesse
> > > > 
> > > > On Oct 11, 2007, at 8:46 AM, Andrea Antonello wrote:
> > > > 
> > > > > Hi all, (and mostly Adrian, because we talked a bit about that in
> > > > > the past):
> > > > >
> > > > > How is the actual interest about R and Udig?
> > > > >
> > > > > I have a couple of collected thoughts about how R should fit into
> > > > > udig and connect direktly to maps and would like to know what you
> > > > > guys think.
> > > > >
> > > > > Python has a rpy package that fully supports r and also traps its
> > > > > errors. So that seems to be a great way to go through jython.
> > > > > You think
> > > > > that we could access to all this if we implement Jython support in
> > > > > the new JGrass console?
> > > > >
> > > > > Different way: the statet
> > > > > plugin? http://www.walware.de/it/statet/index.html
> > > > >
> > > > > Just thought,
> > > > > would be glad to hear comments.
> > > > >
> > > > > Ciao
> > > > > Andrea
> > > > > _______________________________________________
> > > > > User-friendly Desktop Internet GIS (uDig)
> > > > > http://udig.refractions.net
> > > > > http://lists.refractions.net/mailman/listinfo/udig-devel
> > > > 
> > > > _______________________________________________
> > > > User-friendly Desktop Internet GIS (uDig)
> > > > http://udig.refractions.net
> > > > http://lists.refractions.net/mailman/listinfo/udig-devel
> > > _______________________________________________
> > > User-friendly Desktop Internet GIS (uDig)
> > > http://udig.refractions.net
> > > http://lists.refractions.net/mailman/listinfo/udig-devel
> > _______________________________________________
> > User-friendly Desktop Internet GIS (uDig)
> > http://udig.refractions.net
> > http://lists.refractions.net/mailman/listinfo/udig-devel
-- 
Dan Putler
Sauder School of Business
University of British Columbia