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st: New program on SSC - multibar.ado


From   Fred Wolfe <fwolfe@arthritis-research.org>
To   statalist@hsphsun2.harvard.edu
Subject   st: New program on SSC - multibar.ado
Date   Sun, 29 Jul 2007 13:52:46 -0500

Last week during a discussion of bar and dot graphs I complained that Stata graphs did handle overlapping bar and dot graphs well (i.e, didn't do what I wanted them to do).

Nick Cox responded, in part, by suggesting that what I wanted might involve a results set. That started me thinking and I ended up writing a wrapper to -graph bar- and graph dot- that accomplishes the task, though I still think this sort of thing might properly belong in official Stata.

In Stata's -graph bar,over(x)- x has to be a non-overlapping categorical variable. Consider that x represents a categorical variable for treatments A, B, and C that persons might use. But what if persons use A and B.

If we were to use this command, -graph bar A B C-, it would work with overlapping groups. if we wanted:

-graph bar first last,over(x)- it would not work because there is no way to represent overlaps using x.

on SSC thanks to Kit Baum(ssc install multibar) the program -multibar- creates a result set that allows overlapping group representation. The attached .dta file will run the example shown in the help file.

I hope this program will be of use. It should run in Stata 9 and 10.

Fred







Fred Wolfe
National Data Bank for Rheumatic Diseases
Wichita, Kansas
Tel +1 316 263 2125
fwolfe@arthritis-research.org

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