I have a question on using lme on a mixed effects model with nested error structure. After applying lme to the data, and put the outcome in, say TR.lme. I can extract the fixed effects by TR.lme$coef$fixed. However, when I use TR.lme$coef$random.effects, it does not give the variance components that I need, but a vector of values at each nested level. What I want are the estimated variance components that show up with summary(TR.lme), but I can not extract them from TR.lme.
Could you please give any suggestion? I have tried ranef( ), but it seems not to be the right function.
Thank you very much!
Zonghui
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