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st: dropping variables


From   "Eric Uslaner" <euslaner@gvpt.umd.edu>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: dropping variables
Date   Wed, 17 Mar 2004 17:30:25 -0500

Hi,

I know of Nick Cox's great dropmiss program.  I want to do something
akin to it (without having to drop each variable individually).  Say
that a data set has N cases and I want to drop variables that have fewer
than n nonmissing cases.  Theoretically I could generate new variables
through count, but my data set is already close to the maximum allowed
without upgrading to SE (which is why I want to drop some variables). 
Is there a way to do this:

drop if _N < n

or something similar?

Thanks much,

Ric Uslaner
euslaner@gpvt.umd.edu 


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