[R] confidence-intervals in dotchart

Frank E Harrell Jr feh3k at spamcop.net
Tue Feb 10 12:31:06 CET 2004

On Tue, 10 Feb 2004 04:30:46 EST
TyagiAnupam at aol.com wrote:

> My earlier posting should have said "dotchart", not "barchart".
> 1)  How does one show confidence-intervals in a "dotchart" and use
> rownames for labels on the y-axes?  I have looked at "plotCI" in
> "gregmisc" package . But it does not seem to produce something like a
> dotchart.  The statistic, error, upper-bound, and lower-bound are in a
> dataframe.
> 2) How to show CI in a dotchart either using the statistic and, either
> (a) errors or (b) upper and lower bounds from a dataframe?
> An example will be very helpful.

You might look at the example on p.149
http://cran.r-project.org/doc/contrib/Harrell-statcomp-notes.pdf and other
examples in that section.  These use the xYplot and Dotplot functions in
the Hmisc package, which extend lattice graphics to easily handle error
bars and bands.

Frank E Harrell Jr   Professor and Chair           School of Medicine
                     Department of Biostatistics   Vanderbilt University

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