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Re: st: Re: Unique identifier


From   Tom Trikalinos <ttrikalin@mac.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Re: Unique identifier
Date   Fri, 29 Oct 2004 16:55:04 +0300

try
. egen patientToothID = group(patient tooth)
and you'll get a variable "patientToothID" with values 1, 2, ..., n, where n is the number of patient/tooth patterns that you have in the data set.

tom

On Oct 29, 2004, at 4:38 PM, Janet Willard wrote:


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?
Many thanks,
Janet

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