[R-sig-ME] random effects specification

Ken Beath kjbeath at kagi.com
Thu May 1 23:24:13 CEST 2008

On 01/05/2008, at 11:28 PM, Sebastian P. Luque wrote:

> which I presume is due to the fact that the data are unreplicated,
> i.e. individuals get each treatment only once.

No. Due to not having a random component for id in the simulated data.


rid <- rep(rnorm(20),each=3)
dta$n <- dta$n+rid

Then refit the model.

> Are there any gotchas in
> the interpretation of the results after this warning?

Probably not, but with real data I would remove the random effect from  
the model as it is 0.


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