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Re: st: Cluster analysis - cluster kmeans-


From   SR Millis <srmillis@yahoo.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Cluster analysis - cluster kmeans-
Date   Fri, 11 May 2007 14:05:26 -0700 (PDT)

You're going to need more than 1 variable. Cluster
analysis is a multivariable technique.  In addition, a
sample size of only 21 is often too small for cluster
analysis.

SR Millis
--- Herve STOLOWY <stolowy@hec.fr> wrote:

> Dear Statalisters:
> 
> I am not familiar with cluster analysis and don't
> have an easy access to the manual on this topic.
> However, I have a group of 21 observations with one
> variable (a score) and would like to create three
> "homogeneous" groups.
> 
> I found the -cluster kmeans- command. Here are my
> command lines:
> 
> gsort - finance_aggregate
> cluster kmeans finance_aggregate, k(3)
> 
> Each time I run these commands, I get a different
> result (i.e., a different clustering: the three
> groups are different). I looked at the help file but
> don't understand. (It might be related to the start
> option but I am not sure).
> 
> Is there a way to obtain the same result everytime?
> 
> Best regards
> 
> Herve Stolowy
> 
> 
>
***********************************************************
> Professeur/Professor
> HEC Paris
> Département Comptabilité Contrôle de gestion / Dept
> of Accounting and Management Control
> 1, rue de la Liberation
> 78351 - Jouy-en-Josas
> France
> Tel: +33 1 39 67 94 42 - Fax: +33 1 39 67 70 86
> mail: stolowy at hec dot fr
> web: http://studies.hec.fr/web/stolowy
> 
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Scott R Millis, PhD, MEd, ABPP (CN,CL,RP)
Professor & Director of Research
Dept of Physical Medicine & Rehabilitation
Wayne State University School of Medicine
261 Mack Blvd
Detroit, MI 48201

/ `--'( 
< [] []////////|:::)
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Email:  smillis@med.wayne.edu
Tel: 313-993-8085
Fax: 313-966-7682
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