Re: st: RE: tab

[David Kantor <dkantor@jhu.edu>]

At 01:25 PM 12/11/2003 +0000, Nick Cox wrote:
> [...]
>
> 2. -tabulate- is reluctant to tabulate classes which
> don't exist in the data. In particular, you can't
> get zero counts out of -tabulate <myvar>-.
>
> [...]
-tabulate- can give zero counts, using the -subpop(...)- option.

If var2 restricts the dataset so as to exclude some of the values of myvar, 
then

 tabulat myvar, subpop(var2)

will have zero entries for the values in question.

(And presumably, this would hold under -if- or -in- restrictions, as long 
as var2 further restricts the dataset so as to exclude some values of myvar.)

If you really want to see some nonexistant values in a -tabulate-, you can 
extend the dataset to include them, and then create a variable that serves 
as an indicator for the "actual" data. Then present that variable in the 
-subpop(...)- option.

--David


David Kantor
Institute for Policy Studies
Johns Hopkins University
dkantor@jhu.edu
410-516-5404

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