[R-sig-ME] How to usepriors in MCMCglmm?
j.hadfield at ed.ac.uk
Sat Jan 29 15:52:02 CET 2011
Quoting Szymek Drobniak <geralttee at gmail.com>:
> Hi all,
> I'm trying to make some information about using MCMCglmm more systematic,
> but the picture I'm getting from this list and resources on MCMCglmm is a
> little blurry. Could you at least try ;) provide simple criteria that could
> be used to tell whne to use proper and when (we could possibly) use improper
> priors? In general I've been using proper priors and I don;t have much
> experience with improper ones.Also - based on your own experience which
> prior specifications you find more useful? E.g.
> list(R=list(V=1,nu=0.002),G=list(G1=list(V=1,nu=0.002))) is commonly used
> but Wilson's ecologists guide to theanimal model suggests using priors like
> list(R=list(V=some_variance,nu=1),G=list(G1=list(V=some_variance,nu=1))) (of
> course for gaussian data, single variances).
> Any help will be appreciated!
> Szymon Drobniak || Population Ecology Group
> *Institute of Environmental Sciences, Jagiellonian University
> ul. Gronostajowa 7, 30-387 Kraków, POLAND
> *tel.: +48 12 664 52 19 fax: +48 12 664 69 12
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