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Re: AW: st: Panelvar
From
Tobias Friedli <[email protected]>
To
"[email protected]" <[email protected]>
Subject
Re: AW: st: Panelvar
Date
Fri, 6 Aug 2010 10:23:40 +0200
Thank you both very much for the fast response. I will try it and report back.
Regards
Toby
Am 06.08.2010 um 10:21 schrieb "Martin Weiss" <[email protected]>:
>
> <>
>
>
> I think -encode- is all Toby needs:
>
>
> *************
> clear*
>
> inp str11 brand int year
> firstbrand 1990
> firstbrand 1991
> firstbrand 1992
> secondbrand 1990
> secondbrand 1991
> secondbrand 1992
> end
>
> list, noo
>
> //does not work
> cap noi xtset brand year
>
> //does work...
> encode brand, gen(numericbrand)
> xtset numericbrand year
> *************
>
> What is the rest of your code meant to do, Natalie?
>
>
> HTH
> Martin
>
>
> -----Ursprüngliche Nachricht-----
> Von: [email protected]
> [mailto:[email protected]] Im Auftrag von Natalie Trapp
> Gesendet: Freitag, 6. August 2010 10:12
> An: [email protected]
> Betreff: Re: st: Panelvar
>
> On 8/6/2010 10:00 AM, Hobst wrote:
>> Hello
>>
>> I have a panaldata set. I want to use the brandnames as the panel ID
>> variable, but obviously Stata doesnt accpet a string variable as the panel
>> ID var. How can i create a variable that defines a unique numbre for every
>> brand name so i can use it as the panel ID var for my paneldata?
>>
>> Thanks a lot for your help.
>>
>> Regards
>> Toby
>>
> Hi Toby,
>
> I would first encode the string variable:
>
> *encode varname, generate(newvarname)
>
> then I would use "forvalues"
>
> *sort newvarname
> *gen individual = .
> *gen newvarname_lag = newvarname[_n-1]
> *local number = 1
> *replace individual = `number' in 1
> *local anzahl = _N
> *forvalues i = 2/`anzahl' {
> *replace individual = `number' + 1 in `i'
> *replace individual = `number' if newvarname== newvarname_lag in `i'
> *local number = individual[`i']
> *}
> *drop newvarname_lag
>
> I am sorry, there is most probably a much more simple way to do it, but
> I wrote this when I had to identify individuals over more than one
> variable. I hope this helps you.
>
> regards,
> natalie
>
> --
> Natalie Trapp
>
> Research Unit Sustainability and Global Change
> Centre for Marine and Atmospheric Sciences
> Hamburg University
> Bundesstraße 55
> D-20146 Hamburg
>
> PhD student at the International Max Planck
> Research School on Earth System Modeling
>
>
>
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