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st: RE: Identifier from three variables


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Identifier from three variables
Date   Fri, 27 Jul 2007 18:09:22 +0100

I'll answer this myself: 

1. Don't do that. Use -egen, group()- with the -label- option. 

2. See also 

FAQ     . . . . . . . . . . . . . . . . . . . . . . Creating group identifiers
        3/01    How do I create individual identifiers numbered
                from 1 upwards?
                http://www.stata.com/support/faqs/data/group.html

3. If you really must, look into -egen, concat()-, including 
its options. 

Nick 
n.j.cox@durham.ac.uk 

Nádia N. Simőes
> 
>  How can I generate an identifier from three variables? 
> In my data I have a column for the house, one for the family 
> and one for the individual
> 
> example:
> 
> house     family   individual
> 1                 1         1
> 1                 1         2
> 1                 1         3
> 2                 1         1
> 2                 1         2
> ...
> 
> and I would like to know how can I create an identifier per 
> individual such as:
> 
> individual
> 010101
> 010102
> 010103
> 020101
> ...

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