[GRASS-dev] adding lib_arraystats

[Dylan Beaudette]

On Tuesday 12 February 2008, Dylan Beaudette wrote:
> On Feb 11, 2008 7:30 PM, Hamish <hamish_b at yahoo.com> wrote:
> > Dylan wrote:
> > > However, an hour spent tinkering around with the R shared lib
> > > examples left me mostly frustrated....
> >
> > From the everything looks like a nail dept:
> > Does R offer SWIG bindings into the lib that we could use with python?
> >
> >
> > Hamish
>
> This project (http://rpy.sourceforge.net/) comes to mind. Not sure if
> it is SWIG based... It looks like straight-up python:
>
> import Rpy
> ...
>
>
> I suppose that the only problem then is getting Rpy installed. On a
> debian-like system you can install R and Rpy via aptitude. If you
> build R from source, then I suppose you would have to build / install
> Rpy in a similar manner.
>
>
> Before giving up on the C-API to R, I think that there are a couple
> more approaches, which might be simpler.
>
> 1. call R in batch mode. this would involve the use of temp files,
> passing data and commands back and forth from GRASS to R-- with the
> shell as mediator. This would only require a vanilla install of R.
>
> 2. build R as a shared lib, and use the "embedded" interface to R
> commands. There are a couple examples in the source tree for this.
>

I almost forgot the 3rd option:

use the spGRASS6 library in R, and read-in GRASS vector/raster/dbase files 
into an R session.

Dylan


> However-- this is starting to get into the realm of feature bloat...
> As neat as it would be to have R routines which could work directly on
> GRASS data structures, it might be overkill considering the possible
> amount of work. I'll keep checking around and post back other ideas.
>
> On the other hand-- R has so many great plotting / analysis routines,
> it would be a shame to re-implement these in GRASS if they could be
> easily "plugged-into" via some kind of share library / SWIG
> interface.
>
> Dylan



-- 
Dylan Beaudette
Soil Resource Laboratory
http://casoilresource.lawr.ucdavis.edu/
University of California at Davis
530.754.7341