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RE: st: cluster analysis with foreach


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: cluster analysis with foreach
Date   Wed, 9 Jun 2010 18:11:36 +0100

I don't think you can do that meaningfully. If you want cluster all cities in all states, just do that in one. 

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

Maximiliano Manuel Silva Correa

Than you guys. How could I join the sucessive cluster analysis in one
cluster variable??

2010/6/9 Nick Cox <n.j.cox@durham.ac.uk>:
> If you want to do it that way, fine but
>
> levelsof state, local(allstates)
> foreach s of local allstates {
>        ...
> }
>
> is one statement fewer.
>
> Nick
> n.j.cox@durham.ac.uk
>
> Stas Kolenikov
>
> You seem to be thinking in R terms here :)). In Stata, this would be
> something like
>
> levelsof state
> local allstates `r(levels)'
> foreach s in `allstates' {
>  cluster kmeans <list of power variables> if state == "`s'", k(#)
> }
>
> Of course you would also need to think how you will utilize the results.
>
> On Wed, Jun 9, 2010 at 11:36 AM, Maximiliano Manuel Silva Correa
> <maxsilvacorrea@gmail.com> wrote:
>
>> Im stuck trying to run a cluster analysis routine throuth diferent
>> sections of my data. Suppose we have power consumtion data about
>> different cities of the US. What I'd like to do is to run a cluster
>> analysis routine (cluster kmeans for example) by state, because i
>> would like to see in every state which cities have similar power
>> consumtion.
>>
>> It would be something like
>>
>> foreach s in states{
>>
>> cluster(kmeans, power_city)
>>
>> }
>>
>> (states is a string variable)
>>
>> Could someone show me the sintax here, or send similar examples?
>

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