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Re: st: Stata, create a special dummy


From   "Svend Juul" <SJ@SOCI.AU.DK>
To   <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Stata, create a special dummy
Date   Fri, 17 Jun 2005 23:31:15 +0200

Michele,
 
You want to put a tag on duplicate observations (in my field we don't call this a dummy). It can be done with the -duplicates tag- command; try to copy and run the commands below.
 
Svend
 
--------------------------------------------
clear
input men str1 fund date
1 A 20040630
1 A 20040730
1 A 20040830
1 B 20040830
1 B 20040930
2 C 20040630
2 D 20040630
2 D 20040730
3 C 20040630
3 C 20040730
3 C 20040830
3 C 20040930
3 D 20040930
end
format date %9.0f
duplicates tag men date , gen(dup)
list
--------------------------------------------
________________________________________________________ 
 
Svend Juul
Institut for Folkesundhed, Afdeling for Epidemiologi
(Institute of Public Health, Department of Epidemiology)
Vennelyst Boulevard 6 
DK-8000 Aarhus C,  Denmark 
Phone, work:  +45 8942 6090 
Phone, home:  +45 8693 7796 
Fax:          +45 8613 1580 
E-mail:       sj@soci.au.dk 
_________________________________________________________ 

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