<>
Note that -help foreach- toward the bottom says that "foreach must store the
list of elements, whereas forvalues obtains the elements one at a time by
calculation." So your loop would be faster with -forvalues-. Also note you
can attach the -qui- prefix to the -forvalues- command itself.
HTH
Martin
-----Ursprüngliche Nachricht-----
Von: [email protected]
[mailto:[email protected]] Im Auftrag von Jennifer Baxter
Gesendet: Montag, 20. Juli 2009 06:07
An: [email protected]
Betreff: st: dummies from categorical variable
I have a categorical variable with >200 possible values, but
depending on which dataset I use, some of the possible values are not
filled. I want to create dummy values from this variable that are the
same regardless of which dataset I use, ie that reflect all possible
values of that variable.
If I use:
tab ACTIVITY, gen(ACT),
the dummy variables don't align across datasets because dummies are
not created when no respondents report a particular activity.
I could loop over the possible values instead:
foreach act of numlist 1/215 {
qui: gen ACT `act'=(ACTIVITY ==`act')
}
and this works well, except the variable labels aren't then attached
to the dummy variables, and I really want them to be.
Is there an alternative to "tab" that I could use, with an option to
also create dummies for empty cells?
Or, is there a way I can attach variable labels in the loop above
based on the value labels of the original variable (as is done in tab
xx, gen(xxx)) ?
Thanks,
Jenny
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