The short answer is yes.
The longer answer is the lme function in the nlme package uses a
compact representation of the model matrices for a mixed-effects
model. It is a sparse matrix representation that is specific to cases
of strictly nested random effects when there is more that one level of
Dear List,
I downloaded R for the first time yesterday, in the hopes that I might
deal more effectively with a complex repeated measures experimental
design involving inbred strains of laboratory mice. The design below,
somewhat simplified, cannot be computed with standard ANOVA, because
