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st: RE: RE: Other Box plots


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: RE: Other Box plots
Date   Thu, 28 Nov 2002 10:16:14 -0000

Wallace, John
> >
> > I'm still in the early stages of exploring Stata, but I
> > haven't found a way
> > yet to get box plots to be generated the way I prefer.  The
> > built-in "box"
> > parameter in the graph command comes close, in that the
> > whiskers encompass
> > 1.5*IQR and further outliers are plotted individually - but
> > you can't use a
> > by(groupvar) to get an array of related plots.
> > The hbox addition I found in the STB files allows the by(groupvar)
> > arrangement, but the whiskers encompass the entire range of
> > data, rather
> > than a function of the IQR.  This allows true outliers to
> > dominate the graph
> > in an undesirable way, IMO
> > Is there a third way out there?  Or am I going to have to
> > learn how to
> > program ados to get boxplots the way I like them?
> >
>
> One possibility: copy -hbox- and fiddle with its output.

On second thoughts, that's not
quite trivial. If it were, I would have
implemented the feature that John
desires within -hbox-.

Make sure you are also aware of what -dotplot-
can do. With the addition of bars for median
and quartiles, you can have a hybrid display
which increasingly I offer prefer to boxplots.
Any broad patterns and any fine structure
are often clear simultaneously, the best of both
worlds.

Nick
n.j.cox@durham.ac.uk

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