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A simpler count question Re: st: RE: Re: Counts of different valuesin one variable by another variable


From   SamL <saml@demog.berkeley.edu>
To   statalist@hsphsun2.harvard.edu
Subject   A simpler count question Re: st: RE: Re: Counts of different valuesin one variable by another variable
Date   Fri, 26 Mar 2004 07:15:51 -0800 (PST)

I want to know how many values of variable X there are in my data.  I
don't need to know the frequency distribution of X, I need to know how
many values of X there are.  For example, if the true frequency
distribution is:

Value    Frequency   Pct
1          8          8.0
2         20         20.0
3         30         30.0
4         20         20.0
7         12         12.0
15        10         10.0

then, I only want a count of the Value column (which is 6 in the case
above).  My problem is that I -tab1- a variable but there are too many
values for it to run the frequency distribution.  I could use by, but that
could get very tedious with counting, and could be prone to error when I
add up across the by variable.  I expect there to be something on the
order of 3700 values, but I have to check to be sure.

My check of the manual and the stata web-site turned up nothing, but
perhaps I do not know for what command or keyword I should search.

Ideas appreciated.

Thanks.
Sam
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