Coefficient of determination (R^2) when using lme()

Dear R.S. Cotter,
I think that interpretation of R2 is not straightforward and it is area 
of research.. Have a look to

Xu. Measuring explained variation in linear mixed effects models 
Statist. Med. 2003; 22:3527?3541 (DOI: 10.1002/sim.1572)

Orelien, J.G., Edwards, L.J., Fixed-effect variable selection in linear 
mixed models using R2 statistics Comput. Statist.
Data Anal. (2007), doi: 10.1016/j.csda.2007.06.006

Hope this helps you,

vito



R.S. Cotter ha scritto:

Dear mixed models users,

I have recently started using R, and I have learned to use lme ().

Is it possible to interpret coefficient of determination (R^2) when
using lme ()?


Best Regards

R.S. Cotter

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Vito M.R. Muggeo
Dip.to Sc Statist e Matem `Vianelli'
Universit? di Palermo
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90128 Palermo - ITALY
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