[S] xyplot in trellis plus error bars

Frank E Harrell Jr (fharrell@virginia.edu)
Tue, 17 Mar 1998 14:08:54 -0500


Suppose I have a dataframe containing the variables Time, group, mean.y and
standard.error.y and I want to plot the means with Time on the x-axis and
separate
lines by values of 'group'. I need a nice panel function to add error bars to
this
graph. Thanks -

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Frank E Harrell Jr
Professor of Biostatistics and Statistics
Director, Division of Biostatistics and Epidemiology
Dept of Health Evaluation Sciences
University of Virginia School of Medicine
http://www.med.virginia.edu/medicine/clinical/hes/biostat.htm

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