Dear all,

I have a question on the use of GAM with repeated measures. My dataset is as follows:
- a number of study areas where bird abundance has been determined. Counts have been performed in 3 consecutive years and there were 2 counts per year (i.e. in total 6 counts).
- a number of environmental predictors that do not change over year Xi).
When using a GLM, a repeated measures design would like: (for example)

lme(Bird_abundance = study_area + count +year+ X1 + X2 + X3,random = ~count|study_area).

However, I have found no analogue design for a GAM. For now, I have averaged my bird abundances but I wondered whether a more subtle and elegant strategy exists...?

Many thanks,


Diederik

Diederik Strubbe
Evolutionary Ecology Group
Department of Biology, University of Antwerp
Universiteitsplein 1
B-2610 Antwerp, Belgium
http://webhost.ua.ac.be/deco
tel : 32 3 820 23 85


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