[R-sig-Geo] grf and RasterLayer

2010-08-02 Thread Alaios
Hello. I am pretty new to R and to geoR as well. A) I would like to implement an area of X*X km that would be used to Simulate an area map (eg. city's area, suburban area). -X would be a parameter so I do not want it to be fixed -In this map I would like to place users (people), thus I

Re: [R-sig-Geo] spautolm variable selection

2010-08-02 Thread Roger Bivand
On Sun, 25 Jul 2010, Peter Larson wrote: Hello, Is there any way to iterate spautolm to run through all possible models using a set of covariates and choose the one with the lowest AIC? No, there are no step or update facilities for spautolm. Since the choice of RHS variables (and their

Re: [R-sig-Geo] shared boundary lengths ?

2010-08-02 Thread Roger Bivand
On Mon, 26 Jul 2010, toby.patter...@csiro.au wrote: Hi, Apologies up front if this has been covered somewhere already -- I have seen some discussion of a similar problem on the list, but it doesn't quite seem to cover what I'm after. Also I'm new to the spatial side of R, so I might not

Re: [R-sig-Geo] grf and RasterLayer

2010-08-02 Thread Robert J. Hijmans
Alaios, Do you know how I can have not fixed resolution in a RasterLayer? That is not directly possible. Perhaps you can have a set of RasterLayers at different resolutions; and then for a given area (grid cell at the lowest resolution) use the values of the RasterLayer that has non-NA values;

[R-sig-Geo] quick question re: fit.variogram in gstat

2010-08-02 Thread Kerry Ritter
Hi all. I have what I hope is a quick question concerning the use of fit.variogram ingstat. If you assume a a Spherical model for the variogram and the estimated range is say 200m and then you switch models to a Gaussian but want to keep the range fixed at 200m, would you specify 200 for the