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st: RE: dropping missing variables

From   "Nick Cox" <>
To   <>
Subject   st: RE: dropping missing variables
Date   Wed, 10 Sep 2003 15:30:47 +0100

-dropmiss-, STB-60

> Is there a way in which I can drop variables that have only missing
> observations? This is something that happens quite often in general
> purpose surveys in which specific sub-groups are analyzed. 
> It is quite
> annoying to keep all those unnecessary variables in 
> memeory, and quite
> tiring to identify and eliminate them all.

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