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st: New program on SSC - multibar.ado
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
[email protected]
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