Salut Julien, Maybe you could take a look at reparameterization to speed up convergence of your model ? http://www.stat.columbia.edu/%7Egelman/research/published/gelman-etal.pdf
Etienne Julien Beguin a écrit : > Thank you Paulo. Indeed, it seems a very VERY promising approach for a large > kind of spatial models and sounds like a revolution, at least for me. > > Julien > ---------------- > Ph.D. Student > Laval University > > ________________________________________ > De : Paulo Justiniano Ribeiro Jr [[email protected]] > Date d'envoi : 24 mars 2010 18:26 > À : Julien Beguin > Cc : [email protected] > Objet : Re: [R-sig-Geo] CAR model with geoRglm > > Dear Julien > > geoRglm fitis continuoaus spatial models and therefore CAR is not > included. > One recent and exclente alternative is the INLA package > (not in CRAN) available at www.r-inla.org > which fits a wide range of Markov random fields models > > The web-site has intructions and example. > More details in the JRSS-B read paper by Rue, Chopin and Martino (2009) > > > Paulo Justiniano Ribeiro Jr > LEG (Laboratorio de Estatistica e Geoinformacao) > Universidade Federal do Parana > Caixa Postal 19.081 > CEP 81.531-990 > Curitiba, PR - Brasil > Tel: (+55) 41 3361 3573 > Fax: (+55) 41 3361 3141 > e-mail: paulojus AT ufpr br > http://www.leg.ufpr.br/~paulojus > > > > On Wed, 24 Mar 2010, Julien Beguin wrote: > > >> Dear all, >> >> I am fitting a CAR model in WinBugs with proportional data (binomial >> distirbution) as response and a couple of independent variables. I have 1873 >> cells and Bugs does not seem to like so much (1 minute by iteration) when I >> estimate a spatial random effect for each cell (1st order neigboorhood). >> >> I have heard about the geoRglm package for making spatial binomial >> regression using MCMC estimations, but never used it. Is someone know if >> this method could easely handle 1873 cells (at least faster than WinBugs) or >> I am better to be patient and continue with Bugs. >> >> Can you give me some advice please? I would really appreciate it. >> >> Cheers, >> >> Julien Beguin >> ---------------- >> Ph.D. Student >> Laval University >> _______________________________________________ >> R-sig-Geo mailing list >> [email protected] >> https://stat.ethz.ch/mailman/listinfo/r-sig-geo >> >> > _______________________________________________ > R-sig-Geo mailing list > [email protected] > https://stat.ethz.ch/mailman/listinfo/r-sig-geo > [[alternative HTML version deleted]]
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