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st: AW: Dropping observations


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: AW: Dropping observations
Date   Thu, 17 Sep 2009 15:57:16 +0200

<> 

I assume those values are stored as -string-s? If not, turn them into
strings with the -string()- function, and then:


*************
clear*

inp str10 myvar
0011 
8944 
4500 
3512
0989
end

compress

//for two
drop if substr(myvar,1,2)=="00"
list, noobs

//for one digit
drop if substr(myvar,1,1)=="0"
list, noobs
*************



HTH
Martin


-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Ermias Ogbai
Weldemicael
Gesendet: Donnerstag, 17. September 2009 14:48
An: statalist@hsphsun2.harvard.edu
Betreff: st: Dropping observations

Dear Stata users,

I am trying to drop observation from one variable. The variable contains
four digit values (e.g. 0011 8944 4500 3512..). Is it possible to drop an
observation by if condition of the first digit..or first two digits. Like
'drop if value starts with 00'

Thanks,

Ermias O. Weldemicael
PhD student
University of Melbourne



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