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st: RE: Dropping observations


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Dropping observations
Date   Thu, 17 Sep 2009 14:57:05 +0100

Yes. If these are string values, technique is given by 

drop if substr(mystr, 1, 1) == "0" 

drop if substr(mystr, 1, 2) == "00" 

If these are numeric values, tell us more. 

Nick 
n.j.cox@durham.ac.uk 

Ermias Ogbai Weldemicael

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'

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