lme4 "package" etc {Re: [R] lme4 --> GLMM}

Douglas Bates
2005-02-08T11:43:32Z

Martin Maechler wrote:
>>>>>>"Pavel" == Pavel Khomski <pkhomski at
wiwi.uni-bielefeld.de>
>>>>>>    on Tue, 08 Feb 2005 10:20:03 +0100 writes:
>
>
>
>     Pavel> this is a question, how can i specify the random part
>     Pavel> in the GLMM-call (of the lme4 library) for compound
>     Pavel> matrices just in the the same way as they defined in
>     Pavel> the lme-Call (of the nlme library).

The GLMM function in the lme4 package allows you to specify crossed
random effects within the random argument without the need for the
pdBlocked and pdIdent constructions.  Simply ensure that your grouping
factors are defined in such a way that each distinct group has a
different level in the grouping factor (this is usually not a problem
for crossed grouping factors but can be a problem with nested factors)
and list them.  For example

   random = list(rows = ~ 1, columns = ~1)