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Re: st: boxplot


From   Ronan Conroy <rconroy@rcsi.ie>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: boxplot
Date   Tue, 06 Aug 2002 11:38:38 +0100

on 6/8/02 11:14 AM, Olivia Keiser at Olivia.Keiser@hospvd.ch wrote:

> Is it possible to omit the extreme values in the boxplot?
> 
> I've found the option 'symbol(i)' where the outliers are not plotted but
> the axis scale still remains large (and with yscale I can't make it smaller).
> If I include the 'if', the graph looks nicer, but all the extreme values
> are not included to calculate the boxplots.

You could use an -if- condition to exclude them. Stata will not resize a
graph so that it is smaller than the data space.

However, one of the important points of a boxplot is precisely that it does
show outliers. I would at least add a note that outliers at (specify values)
not shown, as people will automatically think that if there are no outliers
visible, then there aren't any.

Ronan M Conroy (rconroy@rcsi.ie)
Lecturer in Biostatistics
Royal College of Surgeons
Dublin 2, Ireland
+353 1 402 2431 (fax 2329)

--------------------
And now, Mr President, how about the global alliance against climate change?
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