Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
AW: st: Panelvar
From
"Martin Weiss" <[email protected]>
To
<[email protected]>
Subject
AW: st: Panelvar
Date
Fri, 6 Aug 2010 10:21:07 +0200
<>
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
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/