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st: RE: Re: MIME-Version: 1.0


From   "Maarten Buis" <M.Buis@fsw.vu.nl>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Re: MIME-Version: 1.0
Date   Tue, 20 Feb 2007 15:18:25 +0100

--- Sergiy Radyakin wrote:
>  var1    var2
> 1        .
> 2        .
 >3        .
> .        1
 >.        2
> .        3
> 
> gen var3=.
> replace var3=var1 if var1!=.
> replace var3=var2 if var2!=.

Good idea, and it work in your example, however Stata knows 
multiple types of missing data (. .a .b .c ...), see 
-help missing-. So it might be safer to use:
replace var3=var1 if var1<.
replace var3=var2 if var2<.

Hope this helps,
Maarten

-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology 
Vrije Universiteit Amsterdam 
Boelelaan 1081 
1081 HV Amsterdam 
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434 

+31 20 5986715

http://home.fsw.vu.nl/m.buis/
-----------------------------------------



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