# Representation of data in libraries

**Douglas Bates
**
bates@stat.wisc.edu

*26 Feb 1998 09:57:57 -0600*

Martin Maechler <maechler@stat.math.ethz.ch> writes:
>* On the other hand: does it really make sense to distribute huge example
*>* data sets as yours above?
*
The purpose of this example is to show that the lme methods work with
very large data sets. These data are from a survey conducted by a
sociologist. He fit a mixed-effects model to them using SAS PROC
MIXED. It took five hours of cpu time on a relatively fast machine
(Pentium II 233 MHz, 64 Mb memory). Once I decide what the model he
used is in our notation, I will try it in lme. I am confident we
can do it much faster.
I decide to omit this data set from the standard distribution for lme
although the way that data sets are organized in R there is not much
penalty other than the disc space for including large examples that
are rarely used.
Following Thomas's suggestion of increasing the -n as well as the -v
option I was able to read the data in with its current form.
--
Douglas Bates bates@stat.wisc.edu
Statistics Department 608/262-2598
University of Wisconsin - Madison http://www.stat.wisc.edu/~bates/
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