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st: keeping only variables with certain number of observations


From   Paul Ma <[email protected]>
To   [email protected]
Subject   st: keeping only variables with certain number of observations
Date   Sun, 9 Jan 2005 01:49:00 -0600

In large datasets I often only want to keep variables that aren't
missing values, so is there some command that will let me keep all
variables such that each variable has a certain number of observations
which are jointly identified with the rest of the variables?

Thanks
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