On Oct 17, 2012, at 10:44 AM, Rich Shepard wrote:
The xyplot help page covers several lattice plots and states that
with the
exception of xyplot the formula can have the form x ~ y | c. I need to
generate x-y plots for only one of two levels of a conditioning
factor. What
is the recommended way to do this?
What exactly is being requested? Do you just need to learn how to use
the subset parameter? I would not think that the conditioning syntax
would be used when there were only one level desired.
--
David Winsemius, MD
Alameda, CA, USA
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