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 [paulojus@c3sl.ufpr.br]
> Date d'envoi : 24 mars 2010 18:26
> À : Julien Beguin
> Cc : r-sig-geo@stat.math.ethz.ch
> 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
>> R-sig-Geo@stat.math.ethz.ch
>> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>>
>>     
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