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Re: st: do group identifiers identify the same groups?


From   Svend Juul <SJ@SOCI.AU.DK>
To   <statalist@hsphsun2.harvard.edu>
Subject   Re: st: do group identifiers identify the same groups?
Date   Wed, 9 Jul 2008 17:37:30 +0200

Jeph wrote:
 
Seems this should be easy, but the only solutions I
can think of are tedious.
 
I have two group identifiers in my data of 108k
observations. I would like to verify that that
they identify the same groups - there are about
800 groups, which rules out the simple inspection
routes.
 
======================================================
 
- and CÚlio gave good advice involving -assert-.
 
I have the problem with -assert- that it is not very 
assertive; it remains silent if things are OK. That is
often good, but here I prefer a positive confirmation.
I would:
 
    . generate samegroup = (g1==g2)
    . tab1 samegroup
    -> tabulation of samegroup  
      samegroup |      Freq.     Percent        Cum.
    ------------+-----------------------------------
              1 |    108,000      100.00      100.00
    ------------+-----------------------------------
          Total |    108,000      100.00
 
This will work both with numeric and string group ids.
 
Hope this helps
Svend

________________________________________________________ 
 
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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