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st: how to obtain a unique identifier from strings


From   Teresio Poggio <[email protected]>
To   [email protected]
Subject   st: how to obtain a unique identifier from strings
Date   Fri, 4 Nov 2005 15:46:56 +0100

Dear statalisters,

this may be an elementary question but I could not find a solution in
Stata documentation and the list archives, so here I am...

I'm working (Stata 9/SE) with a quite large dataset (>300.000 records)
with observation on individuals. Each individual may be related to
more than one record. The structure is as following:


Teresio    0     1     0
Mario      1     2     0
Teresio    1     1    2
....

I'ld like to convert a string variable "Name" into a unique numerical
identifier and obtain something like this:

1            0     1     0
2            1     2     0
1            1     1    2
....

Is there any way to do this job in Stata?
I've tryed with the encode command, but Stata stopped because there
are more than 65000 unique values (by the way: I don't care about
labels ...).


Any help would be appreciated,

Teresio

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