[R-sig-Geo] coding

[Roger Bivand]

On Tue, 2 Nov 2004, Sam R. Smith wrote:

> Hi there, I wonder where to start coding and contribute to SPDEP
> function. I have statistics and planning background. Also, I know VB and
> some R language. Is there any sample code I can follow? I really want to
> see something coded in VB or R.

Well, at the moment I run the CVS archive for spdep locally, but at the 
workshop at Lancaster last week, we talked through putting the CVS archive 
on sourceforge, so that development could be opened up a bit more than it 
is now - now contributors email me suggestions, and I commit after 
reviewing. 

The source code is available from CRAN too, so this has worked quite well. 
There are two areas which need advancing now, and help will be useful in 
either: adapting spdep to use the new S4 classes provided in the 
forthcoming sp package, including adapting the neighbour and weights 
classes from S3 to S4 and adding rectangular weights (the weights 
relations between in-set and out-of-set regions when subsetting), and the 
incorporation of CAR models.

With regard to VB, the ArcGIS link to R is illustrated at:

http://perso.univ-lr.fr/csaintje/Recherche/RArcgis/index.html

hosted by Christophe Saint-Jean; and an interesting example:

http://www.gisvet.org/Documents/GisVet04/RegularPapers/Tait.pdf

Of course there are other Windows VB clients that can run R as a server, 
like Excel, but I'm not aware of examples doing spatial work.

I hope these will give you some ideas,

Roger Bivand


> Thanks,
> Sam R. Smith
> 
> 
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-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Breiviksveien 40, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 93 93
e-mail: Roger.Bivand at nhh.no