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st: generating a new numerical variable3 using a string variable2 which is nested in a numerical variable1


From   José Maria <jmpsouza@usp.br>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: generating a new numerical variable3 using a string variable2 which is nested in a numerical variable1
Date   Sat, 14 Nov 2009 13:11:58 -0200

Dear Statalisters:
sorry for so long a  name in the subject.
I need to generate a variable3 which is the numerical identification of a string variable2, that is nested in alphabetical order in a numerical variable1. The final result would be something like
var1 (already exist)       var2 (already exist)    var3 (to be generated)
1                                    a                                    1
1                                    a                                    1
1                                    a                                    1
1                                    b                                    2
2                                    m                                   1
2                                    m                                   1
2                                    n                                    2
2                                    n                                    2
2                                    p                                    3
3                                    c                                    1
3                                    c                                    1
3                                    c                                    1
3                                    c                                    1
   Thanks for any help.

José Maria

Jose Maria Pacheco de Souza, Professor Titular (aposentado)
Departamento de Epidemiologia/Faculdade de Saude Publica, USP
Av. Dr. Arnaldo, 715
01246-904  -  S. Paulo/SP - Brasil
fones (11)3061-7747; (11)3768-8612;(11)3714-2403
www.fsp.usp.br/~jmpsouza

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