![]() november 2011 10:33Ĭc: Re: asreml ar(1) x ar(1) spatial model ![]() The book by Zuur et al 2009 "Mixed Effects Models and Extensions in Ecology with R" has some nice examples in this direction that could easily be solved in ADMB as worked examples.įra: [ På vegne af H. simple examples of how to do AR(1) processes, temporal and spatial correlations. on a 10x 10 matrix, so that it is feasible), and then have the sparse-matrix extension once people understand that.Īnother suggestion for a more general approach could be to build up a section on "incoporating correlation structures"? i.e. Part of the problem I found is the sparse-matrix aspect of the example - maybe it could be good to have a simpler instructive example where it is done by "brute-force" first (e.g. Kasper's example that is there at the moment is pretty dense and hard to make headway with for to those of us that are not familar with the finer points of spatial modelling. As a user who is struggling with spatial issues, I'd love to see this part of the ADMB website fleshed out more - potentially as a first step towards such a workshop.
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