[R] (no subject)

[Robin Hankin]

Jonathan

the BACCO bundle (emulator package) does exactly what you require.

(it's easier to think in terms of the variance matrix than a matrix
of distances, tho')

HTH

Robin



On 5 Jul 2007, at 20:07, Jonathan Greenberg wrote:

> I'm trying to hunt down an appropriate kriging package for my specific
> application, and I was hoping someone on the R list might have some  
> pointers
> --  I'm interested in performing kriging and related spatial  
> interpolations
> with one of the R packages, but I need to be able to provide my own
> point-to-point distances (e.g. I do not want to use standard  
> between point
> distances, as calculated by Euclidean or other similar distance  
> measures).
> Is there an R package that *I* can provide the matrix of distances  
> between
> every pair of points (e.g. for 10 points, I would have a 10 x 10  
> matrix of
> distances)?  Similarly, if this is possible, can I then provide  
> this package
> a vector of distances from each point to an arbitrary unknown  
> location (in
> my example, this would be a 1x10 vector) and apply the model to  
> this vector
> to predict a single unknown point?  It seems most (if not all) of the
> kriging packages I'm finding for R take the x,y,z location as the  
> inputs and
> calculate these distances themselves.  Thanks!
>
> Sincerely,
>
> Jonathan Greenberg
>
> --
> Jonathan A. Greenberg, PhD
> Postdoctoral Scholar
> Center for Spatial Technologies and Remote Sensing (CSTARS)
> University of California, Davis
> One Shields Avenue
> The Barn, Room 250N
> Davis, CA 95616
> Cell: 415-794-5043
> AIM: jgrn307
> MSN: jgrn307 at hotmail.com
>
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--
Robin Hankin
Uncertainty Analyst
National Oceanography Centre, Southampton
European Way, Southampton SO14 3ZH, UK
  tel  023-8059-7743