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Re: st: Re: Unique identifier


From   Mark Schaffer <M.E.Schaffer@hw.ac.uk>
To   statalist@hsphsun2.harvard.edu, Janet Willard <willard66@hotmail.com>
Subject   Re: st: Re: Unique identifier
Date   Fri, 29 Oct 2004 13:44:39 +0100 (BST)

Janet,

Quoting Janet Willard <willard66@hotmail.com>:

> 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?

The -group- option of the -egen- command, applied to the variable you've 
created above, might do the trick.

--Mark

> Many thanks,
> Janet
> 
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Prof. Mark Schaffer
Director, CERT
Department of Economics
School of Management & Languages
Heriot-Watt University, Edinburgh EH14 4AS
tel +44-131-451-3494 / fax +44-131-451-3008
email: m.e.schaffer@hw.ac.uk
web: http://www.sml.hw.ac.uk/ecomes
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