Allan Garland wrote:
> I have what should be a very simple question, but I haven't been able to
> figure out the answer. I want to do group mean comparison t-tests and
> rank sum tests on a number of different variables.. But, it appears
> that both -ttest- and -ranksum- will only do 1 variable at a time. So,
> is there a single command that will let me put in any number of
> variables (along with the 2-level grouping variable, of course) and will
> then do ALL the tests at once?
>
The easiest angle of attack is probably:
foreach outcomevar of varlist [outvar1 outvar2 ...] {
foreach grpvar of varlist [grpvar1 grpvar2 ...] {
ttest `outcomevar', by(`grpvar')
ranksum `outcomevar', by(`grpvar')
}
}
where of course you need to provide suitable variable names for outvar1,
grpvar1, etc., see -help varlist- . For more information see -help foreach-
Best,
Henrik
--
Henrik St�vring, PhD
Research Unit of General Practice
University of Southern Denmark
J.B. Winsl�ws Vej 9
DK-5000 Odense C
Phone: (+45) 6550 3692
Fax: (+45) 6591 8296
email: [email protected]
Homepage: http://www.biostat.sdu.dk/~stovring
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