Thank you Luca

Reading that I interpreted you could choose REML or ML for lmer, but
glmer would
use REML. I thought that, mainly because I have got different results
fitting the same model in glmer and glmmML and differences in REML and ML
could be the reason.

Cheers,

Marcio

2009/12/8 Luca Borger <lborger@uoguelph.ca>

> Hello
>
> >is there any
> >package capable to do model selection using a glmm object fitted by ML?
>
> unless I got this wrong, GLMMs are fitted by ML. If you type
>
> ?lmer
>
> after loading the lme4 library you can see that it says:
>
> "REML logical argument to lmer only."
>
>
> HTH
>
>
> Cheers,
>
> Luca
>
>
> ----- Original Message -----
> From: "Marcio M. de Morais Jr." <moraisjr@gmail.com>
> To: r-sig-mixed-models@r-project.org
> Sent: Tuesday, 8 December, 2009 13:37:28 GMT +01:00 Amsterdam / Berlin /
> Bern / Rome / Stockholm / Vienna
> Subject: [R-sig-ME] Model selection and averaging
>
> Dear list members,
>
> I am using glmmML package to access the effects of variables on
> presence-absence data set.  I intend to use IC model selection and
> averaging, and have looked for a package to do it. I have found none that
> can work with glmmML objects, but MuMIn works with glmer. Since my models
> are only different in their fixed effects, I would like to know if it is
> correct to use model selection for glmer objects that are fitted by REML. I
> have read that models fitted by REML can be compared only if they are
> different in their random effect. Is that right? If it is, is there any
> package capable to do model selection using a glmm object fitted by ML?
>
> Thank you very much for your consideration
>
> Marcio de Morais
>
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>
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>



-- 
Marcio M. de Morais Jr
Pos-Graduacao em Ecologia e Recursos Naturais - LCA/CBB.
Universidade Estadual Norte Fluminense
Av. Alberto Lamego, 2000
Campos dos Goytacazes, RJ
28013-602, BRASIL.
Tel: 55-22-2726-1471
     55-22-8117-0412
===========================

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