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Re: st: Using a while loop to compare rows and delete them?


From   brendan.halpin@ul.ie (Brendan Halpin)
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Using a while loop to compare rows and delete them?
Date   Wed, 20 Jun 2012 17:18:46 +0100

I suspect it would be a lot more efficient to avoid using while, and
just work with variables. For instance, you could in a first pass define
a "situation" variable for all cases, and then process that in a second
pass.

If the logic of your code involves dropping cases before later defining
the "situation", perhaps you need to identify and drop these cases in a
prior pass. 

I'm thinking in terms of working like this:

. gen situation = 0
. replace situation = 1 if begepi[`i']!=begepi[`j'] | id[`i']!=id[`j']
. replace situation = 2 if status[`i']==5 & status[`j']==5 & benefit[`i']==1 ///
                                          & situation == 0 

and so on. 

Brendan
-- 
Brendan Halpin,   Department of Sociology,   University of Limerick,   Ireland
Tel: w +353-61-213147  f +353-61-202569  h +353-61-338562;  Room F1-009 x 3147
mailto:brendan.halpin@ul.ie    ULSociology on Facebook: http://on.fb.me/fjIK9t
http://teaching.sociology.ul.ie/bhalpin/wordpress         twitter:@ULSociology
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