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


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