On Jun 29, 2012, at 8:48 PM, torvon wrote:
I'm sorry, but I wasn't aware that I should attach data (and can't,
because I
must not disclose them).
No one said you needed to offer confidential data, only that you
needed to submit a test data.frame that had the same basic structure.
You can sibsitute factors that are just letters and numbers that are
generaterd with rnorm().
Thanks for helping me get rid of the individual points, I'm now
trying to
get standard errors and - more importantly - parallel lines for
different
values of a variable, e.g. history of depression YES=line1 , NO=line2.
Adding group=variable, in the xyplot argument doesn't have any effect.
There are two ways to do grouping: with the group= argument and with
the bar "|" formula mechanism .... but again, the expectation is
that you will provide a sensible test dataset.
Sorry, I really did read through the xyplot document and the help, and
googled this problem, but found no solution.
The help page for xyplot is long and detailed. Sometimes is is better
to start with
?Lattice
And don't forget:
?panel.xyplot
--
David Winsemius, MD
West Hartford, CT
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