[R] binary data with correlation

From: yvonne fabian <yvo.fabian_at_gmx.de>
Date: Mon, 21 Mar 2011 08:39:31 -0700 (PDT)


Dear posters,
I have a question concerning binary data analysis. I have presence absence data of 5 sampling sessions within 3 years, of 12 fields. Each field had 12 traps. I would like to analyse the data with a Generalized Estimating Equations (GEE) Model in R. For the abundance data I used a gls with the function:
correlation = corARMA(form = ~ session|trapfield, p = 1, q = 0)

But now I want to use presence absence data…I know about the problem with correlated -binary data- but maybe somebody already created a solution? Something like that, which is not working….

rgee1 <- geeglm(Alus01 ~ treatment + scale(LAI) + scale(log(Tot_Sp)) + scale(AveH) , data = plates, family = binomial, waves = session, id = trapfield, corstr = "ar1")

Any help is appreciated a lot….
Thanks
Yvonne

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