[R-sig-Geo] Modeling ordinal data

[White.Denis at epamail.epa.gov]

> Hi
>
> Is there a possiblity to estimate classification and regression tree
> models taking spatial dependence into account?
> Or are there any viable functions in R to model spatial data with
> ordinal response, e.g. using something like autoregressive error
terms?
>
> Thanks for your advice!
> Christof

Scott Urquhart at Colorado State University (nsu at stat.colostate.edu)
developed with a student a pre-whitening approach to handling spatial
dependence in regression trees.  There are a set of R/Splus functions
that I believe are available.  If you contact him and decide that you
want to use these, and he doesn't have them, I think I can find them.