st: counting values across variables

[Jason Thompson <jat@northwestern.edu>]

Is there a Stata equivalent of the SPSS count function, which counts the 
number of occurrences of a particular value amongst a set of variables? 
Something like this:

count (newvar)=a1 to a21 (5), which assigns newvar the number of times 
a1-a21 equals 5 for each case?

Nothing in egen seems to be quite what I'm looking for.


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