[R] display functions in groupedData and lme
scott.rifkin at yale.edu
Sat Feb 7 01:50:22 CET 2004
I'm trying to set up a mixed model to solve using lme. It will have 3
fixed effects, two random effects and two interaction terms.
I've been reading Pinheiro's and Bates's book on the nmle library, but
find the part about display functions to be unclear. When creating a
groupedData object from a data.frame, you need to enter a function of the
form: response ~primary|grouping
Does this display function serve any purpose later on when specifying the
model in the call to lme? If so, how would I include more terms in
primary or grouping (I tried primary1+primary2+... as per one post in the
archives, but it didn't work). If not, is it just for purposes of
displaying the data?
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