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st: RE: Re: Unique identifier
As various people have pointed out,
1. -egen, group()- does this (although I'd point
to the -label- option as possibly useful)
2. what you did in fact supplied what you wanted.
In addition, you used -catenate-, which you
presumably got from SSC. I guess that it's my
fault that this is not flagged in its write-up
as a good idea only for Stata 5 users. Users of more
up-to-date Statas should use -egen, concat()- (in official
Stata 7 or 8, or in STB-50, Stata 6) for the same
purpose, concatenation of string variables.
> I have a dataset that consists of a number of patients and the tooth
> treated, typically of the form Evans LL5. I wanted to combine
> these into a
> single numerical variable to identify each specific patient / tooth
> combination. The syntax I have used is:
> catenate code = patient tooth,punct(no)
> encode code,gen(code1)
> This returns a long variable which has the "numerical value"
> EvansLL5. What
> I really wanted was a numerical variable such as 1. Can I achive this?
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