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RE: st: RE: Transforming Unique IDs


From   Nick Cox <n.j.cox@durham.ac.uk>
To   "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu>
Subject   RE: st: RE: Transforming Unique IDs
Date   Mon, 23 May 2011 11:49:46 +0100

Note that the -label- option gives you the best of both worlds should you want it. 

Nick 
n.j.cox@durham.ac.uk 

Dennis Kramer

Thank you Jan, that was the fix. Very much appreciated

On Mon, May 23, 2011 at 6:42 AM, Jan Bryla <JBR@finansraadet.dk> wrote:
> I am not quite sure what the objective is, but the group function with -egen- would generate a new id based on the order of the old id.
>
> egen newid=group(id)

Dennis Kramer

> I am working with a large panel data set and I need to transform the
> current unique IDs into a new set of unique IDs while maintaining the
> panel nature of the data. For example,
>
> Year 1     ID1     Var 1    Var2     Var3    NewID1
> Year 2     ID1     Var 1    Var2     Var3    NewID1
> Year 3     ID1     Var 1    Var2     Var3    NewID1
> Year 1     ID2     Var 1    Var2     Var3    NewID2
> Year 2     ID2     Var 1    Var2     Var3    NewID2
> Year 3     ID2     Var 1    Var2     Var3    NewID2
> Year 1     ID3     Var 1    Var2     Var3    NewID3
> Year 2     ID3     Var 1    Var2     Var3    NewID3
> Year 3     ID3     Var 1    Var2     Var3    NewID3
>
> does anyone have a algorithm to produce a new set of unique IDs while
> maintaining the panel function? I have looked through the current FAQs
> and past listserv discussions and have not found any suggestions that
> would create a new ID while maintaining the panel groupings.
>

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