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Re: st: bysort problem


From   "Svend Juul" <SJ@SOCI.AU.DK>
To   <statalist@hsphsun2.harvard.edu>
Subject   Re: st: bysort problem
Date   Mon, 26 Feb 2007 12:46:09 +0100

Nikos wrote:

I'm currently writing a program that in some point checks
if more than observations have two vars (E and SE) equal. 
If more than one exists then SE is increased by 0.001:

tempvar _id
qui gen `_id'=0
local _idN=2
while `_idN'!=1 {
bysort `E' `SE': replace `_id'=_n if `touse'
count if `_id'>1 & `touse'
replace `SE'=`SE'+(`_id'-1)*0.001 if `_id'>1
sum `_id' if `touse', detail
local _idN=r(max)
list `E' `SE' `_id' if `touse'
}

when I run the above piece of code bysort fails in the second pass:

2
(2 real changes made)
----------------------------------------------------

I have no intent to try to understand the above commands. But
to help yourself you might use the -trace- command. To restrict
the amount of output you might also use -set tracedepth- :

   set tracedepth 1
   set trace on
   - and run the program

This will let you se how your macros expand.

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: +45 8942 6090
Home:  +45 8693 7796
Email: sj@soci.au.dk
__________________________________________ 

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