[R-sig-ME] Non normal random effects
Gustavo Betini
betinig at uoguelph.ca
Mon Nov 29 16:02:45 CET 2010
Lets say that I want to look at the interaction between Species and some other variable...Temperature. The right specification would be
(Temperature|Species) + (Temperature|Station:Species)
or simply
(1|Species) + (Temperature|Station:Species)
Thanks,
Gustavo S. Betini
Dept. of Integrative Biology
University of Guelph, Canada
On 10-11-27 12:04 PM, Douglas Bates wrote:
Just in terms of the model specification, do you really mean
(1|Species/Station)? That expands to
(1|Species) + (1|Species:Station)
and wouldn't reduce to (1|Station) in a model specification. I think
you meant "species within station", which would be written as
(1|Station/Species) although I prefer the more explicit form
(1|Station) + (1|Station:Species)
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