Thanks for the reference to -, subpop()- which
somehow has never registered with me; indeed
I don't think I ever understood it.
Here is the sort of example I had in mind. Some
people would like explicit zeros in the case
of rep78 == 1, 2 & foreign == 1. Can -, subpop()-
help here, directly, without changing the dataset?
(This was one motivation for writing -tabcount-,
now on SSC. I thought that such tables should be
possible on the fly, so far as the user is
concerned.)
. bysort foreign : tab rep78
______________________________________________________________________
_________
-> foreign = Domestic
Repair |
Record 1978 | Freq. Percent Cum.
------------+-----------------------------------
1 | 2 4.17 4.17
2 | 8 16.67 20.83
3 | 27 56.25 77.08
4 | 9 18.75 95.83
5 | 2 4.17 100.00
------------+-----------------------------------
Total | 48 100.00
______________________________________________________________________
_________
-> foreign = Foreign
Repair |
Record 1978 | Freq. Percent Cum.
------------+-----------------------------------
3 | 3 14.29 14.29
4 | 9 42.86 57.14
5 | 9 42.86 100.00
------------+-----------------------------------
Total | 21 100.00
Nick
[email protected]
> >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.
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