[R] glmmML

Prof Brian Ripley ripley at stats.ox.ac.uk
Mon Mar 27 16:50:35 CEST 2006

yOn Mon, 27 Mar 2006, Szentirmai Istvan wrote:

> Dear R Users,
> I'm looking for a similar function as step() or drop1() for glmmML models,
> but couldn't yet find any. I would appreciate if anyone could help me find
> such a function.

If you read the help for those functions, you will see that 'all' you need 
is to specify an extractAIC() function for such models.

However, I don't think even defining AIC for them is that easy (what do 
you do about zero variance parameters, for example?).

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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