[R] spatial functions

[Ben Bolker]

  In particular, VR's "spatial" package does have correlogram, variogram,
and Kfn (which is the equivalent of Khat), and the sgeostat package
appears to have a variety of variogram estimators. I think it depends on
your degree of expertise, how much of a cheapskate you are, and how much
you're willing to fuss to make things work.  I suspect that S+SpatialStats
was originally built on top of the VR functions, but it has been extended
and polished since; the documentation is certainly more polished (I've
bought S-PLUS and S+SpatialStats, but haven't got around to using them yet
-- not because I've been using R to do the same things, but just because I
haven't done any of that kind of spatial work recently).
  If you have any particular analyses in mind I can look in the
S+SpatialStats manual and see if they're covered.

On Fri, 19 May 2000, Thomas Lumley wrote:

> On Fri, 19 May 2000, Tord Snall wrote:
> 
> > Hi all,
> > 
> > I am considering buying S-Plus but I wonder if that is really necessary
> > since it seems to be possible doing most (all?) things using R instead.
> > 
> > More specifically I am interested in the functions available in the
> > SpatialStats module of S-Plus. It seems as if the functions in the module
> > (Khat, variogram, correlogram etc.) are not available in R base.
> > 
> > I now wonder: 
> > Are these spatial functions available somewhere on the web? 
> 
> There are some spatial functions in the sgeostat package on CRAN and
> some in the `spatial' package in the VR bundle and there
> may be more on Statlib (lib.stat.smu.edu)
> 
> > Can I load the SpatialStats module into R without having S-Plus or in some
> > other way get the functions from the module into R?
> 
> It would probably not work. More worryingly, it might almost work but give
> wrong answers in some cases. It wouldn't be supported (we don't have the
> code and Mathsoft obviously wouldn't feel obliged to help). In any case,
> if you want the commercial add-ons to S-PLUS you probably want S-PLUS
> itself.
> 
> 
> 	-thomas
> 
> Thomas Lumley
> Assistant Professor, Biostatistics
> University of Washington, Seattle
> 
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-- 
Ben Bolker                                  bolker at zoo.ufl.edu
Zoology Department, University of Florida   http://www.zoo.ufl.edu/bolker
318 Carr Hall/Box 118525                    tel: (352) 392-5697
Gainesville, FL 32611-8525                  fax: (352) 392-3704

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