Re: [R-sig-Geo] Can you krige with a nominal response variable

2006-12-07 Thread Edzer J. Pebesma
Ken, The indicator kriging idea does not stop at a single binary variable. The "standard" (or "Stanford"?) way of getting non-negative predictions, and possibly predictions that sum to one is rather pragmatic--simply postprocessing predictions. There is a cleaner solution, called compositional

Re: [R-sig-Geo] Can you krige with a nominal response variable

2006-12-06 Thread Christopher Paciorek
I might consider using gam() in R to smooth the 0/1 indicator for each class individually based on a Bernoulli model - doing each class individually. A downside of course is that the resulting smoothed maps of the proportions for each class would not add to one at an individual location, but th

[R-sig-Geo] Can you krige with a nominal response variable

2006-12-06 Thread Pierce, Ken
Is there a method for kriging a response with multiple states, for instance vegetation class in 10 classes? I know indicator kriging would work for a boolean variable. Is there an extension for multiple responses? Kenneth B. Pierce Jr. Research Ecologist Landscape Ecology, Modeling, Mapping and