st: Count presence of item on different vars

["Nikolaos A. Patsopoulos" <npatsop@cc.uoi.gr>]

Hi all,

I've got a set of variables v6-v146, each one containing string values 
(unique values ~4500):

v6    v7   v8   v9   v10...
text1   text1   text3   text45 text1...
text5   text2   text1   text455   text1
.....

I want to count how many times each of the values appears in at least 
one of the v6-v146 in each row [observation], e.g. text1 appears at 
least once in 7365obs.

How can achieve this?


Nikos

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