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


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: generating a new numerical variable3 using a string variable2 which is nested in a numerical variable1
Date   Sat, 14 Nov 2009 19:10:46 +0100

<>

Jose could also use:


*******
clear*

inp byte var1 str1 var2 
1  a
1  a
1  a
1  b
2  m
2  m
2  n
2  n
2  p
3  c
3  c
3  c
3  c
end

compress

contract var1 var2
bys var1: gen byte num=_n
expand _freq
sort var1 var2
drop _freq
li, noo sepby(var1)
*******


HTH
Martin

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of José Maria
Sent: Samstag, 14. November 2009 16:12
To: statalist@hsphsun2.harvard.edu
Subject: st: generating a new numerical variable3 using a string variable2
which is nested in a numerical variable1

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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