This directory contains a "data" directory with some of the data sets
from the book "SAS System for Mixed Models" by Littell, Milliken,
Stroup, and Wolfinger (1996) SAS Institute.  These are in the form of
S-PLUS source code (.q files) that produce groupedData objects.
Another directory "transcripts" contains sample S transcripts (.St
files) for analyses to parallel those in the Littell et al. book but
using instead the lme function from the nlme3 library in S-PLUS.  The
transcripts directory also contains .q files that give only the S-PLUS 
code to produce the transcript.  They can be used with "Splus BATCH" to
check that your copy of the nlme3 library is producing the expected
results.

The .q files are S-PLUS source code that should be read with the source
function in S-PLUS. 

There are a few comment lines at the beginning of each data file to
describe the data and which data set in "SAS System for Mixed Models"
it corresponds to.

Please see the paper "lme for SAS PROC MIXED users" in PDF format in
this directory for some general comments on using lme versus using 
SAS PROC MIXED.
