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RE: st: Keeping specific observations


From   Afif Naeem <[email protected]>
To   <[email protected]>
Subject   RE: st: Keeping specific observations
Date   Fri, 31 Aug 2012 12:46:52 -0400

Shouldnt "drop if v1 == . " work?

Afif

> From: [email protected]
> To: [email protected]
> Date: Fri, 31 Aug 2012 17:43:47 +0100
> Subject: st: Keeping specific observations
> 
> Dear Statalisters,
> 
> I would appreciate your help with the following conundrum. Assume I have a dataset that looks like this:
> 
> Year         ID        v1
> 2000         1          2
> 2001         1          2
> 2002         1          3
> 2000         2          3
> 2001         2          .
> 2002         2          3
> 2000         3          .
> 2001         3          .
> 2002         3          .
> 
> What I want to achieve is to only keep those individuals that appear with any non-missing values for v1 for any of the years in the dataset.
> 
> In other words, I don't think that a command: "keep if v1<." would do, because that would also take out the 2001 observation for the second individual (ID==2), which I'd like to remain in place.
> 
> Any ideas are welcome,
> Eleimon
> 
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