[R] A repeated measures, linear mixed model (lme) WITHOUT random effects...

Mark Na mtb954 at gmail.com
Tue Aug 26 01:59:35 CEST 2008


I am trying to fit a repeated measures linear mixed model (using lme) 
but I don't want to include any random effects. I'm having trouble (even 
after consulting Pinheiro & Bates 2000) figuring out how to specify the 
repeated measure without including it in the specification of a random 

My data consist of repeated "counts" in "plots" that I wish to model as 
a function of "habitat". This attempt:


doesn't consider the repeated nature of my counts (i.e., that there are 
multiple rows in my dataframe for each plot). I know how to 
include"plot" as a random effect, but I don't wish to do that, and I 
can't see how to include it without doing so.

I'll appreciate any help you can provide.

Thanks, Mark

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