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Re: st: collapse prob

From   Svend Juul <SJ@SOCI.AU.DK>
Subject   Re: st: collapse prob
Date   Tue, 20 May 2008 10:38:22 +0200

Martin Weiss wrote:

In this example, does your Stata complain about a "name conflict" as

webuse college, clear
collapse (mean) gpa (median) gpa [fw=number], by(year)

In effect, you cannot calculate two statistics for the same variable
renaming one of the results. This is mentioned in [D] collapse at the
of page 48, but rather cursorily. And correct me if I am wrong, but
there is
just no way you could have these statistics renamed in the dialog box.
must first find out that you have the problem I am describing, and
edit the command line to 

webuse college, clear
collapse (mean) meangpa=gpa (median) mediangpa=gpa [fw=number], by(year)

to make this work. It took me quite some time to find that out...


In the dialog box you can type in the variable field:


Logically, I think it is obvious that two different pieces of
information must have different names.


Svend Juul
Institut for Folkesundhed, Afdeling for Epidemiologi
(Institute of Public Health, Department of Epidemiology)
Vennelyst Boulevard 6
DK-8000  Aarhus C, Denmark
Phone:  +45 8942 6090
Home:   +45 8693 7796

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