Krista wrote:
I have two variables: age at first poker use (poker) and age of first
tobacco use (tobacco).
I want to create a variable (risk_behaviour) with 3 levels that will
have the value labels of 1 = tobacco<poker, 2 = tobacco>poker, and 3
tobacco=poker.
----------------------------------------------
Austin Nichols and Nick Cox gave good solutions. I think, however, that
the following is simpler. If one of the variables is missing, risk will
be missing too.
. generate risk = sign(tobacco-poker)
. recode risk (-1=1)(0=3)(1=2)
For help on the sign() fuction, type
. help sign()
Hope this helps.
Svend
__________________________________________
Svend Juul
Institut for Folkesundhed, Afdeling for Epidemiologi
(Institute of Public Health, Department of Epidemiology)
Vennelyst Boulevard 6
DK-8000 Aarhus C, Denmark
Phone: +45 8942 6090
Home: +45 8693 7796
Email: [email protected]
__________________________________________
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