I've found using the arm package to be very useful.
require(arm)
then use ranef(Full_model) and fixef(Full_model)
On Wed, Sep 22, 2010 at 05:39:41PM +1000, Lorenzo Cattarino wrote:
> Hi again,
>
>
>
> Sorry, probably I was not clear enough.
>
>
>
> I was wondering if there is a way in R to identify (and extract) only
> the random effects, which, because I am using the lmer function, are the
> terms with the symbol | on the left side of the grouping variable
> ("SITE" in my example).
>
>
>
> Thanks
>
>
>
> Lorenzo
>
> From: Lorenzo Cattarino
> Sent: Wednesday, 22 September 2010 5:23 PM
> To: r-help@r-project.org
> Subject: extracting random effects from model formula
>
>
>
> Hi R-users
>
>
>
> I would like to extract the random effects ("1|SITE", "1+SPECIES|SITE"
> and "BA|SITE") from this model formula:
>
>
>
> Full_model <- formula (VAR ~ (1|SITE) + (1+SPECIES|SITE) + (BA|SITE) +
> HEIGHT + COND + NN_DIST)
>
>
>
> I tried:
>
>
>
> terms(Full_model)
>
> labels(terms(Full_model))
>
>
>
> but I could not distinguish between random and fixed effects.
>
>
>
> thanks
>
>
>
> Lorenzo
>
>
> [[alternative HTML version deleted]]
>
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