R help - Jan 2003 - Validation of clustering

Hi,
I'm using the library cluster to cluster a set of figures (method CLARA).
Somebody that it work with clustering would know informs what I make to
evaluate the clustering?

Tks VM,
Francisco.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Francisco Júnior,
Computer Science - UFPE-Brazil
"One life has more value that the
world whole"
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Hi,

I am not really sure what you want to know. 
If you simply want to know how to find the resulting clustering, consider
help(clara.object). For validation and assessment of the clustering, you
might use a silhouette plot, see help(plot.partition),
help(partition.object). 

For more descriptions consider the book of Kaufman and Rousseeuw; some free
material is on
http://win-www.uia.ac.be/u/statis/index.html
(Programs->Clustering)

Best,
Christian

On Thu, 30 Jan 2003, Francisco do Nascimento Junior wrote:
> Hi,
> I'm using the library cluster to cluster a set of figures (method
CLARA).
> Somebody that it work with clustering would know informs what I make to
> evaluate the clustering?
> 
> Tks VM,
> Francisco.
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> Francisco J?nior,
> Computer Science - UFPE-Brazil
> "One life has more value that the
> world whole"
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> http://www.stat.math.ethz.ch/mailman/listinfo/r-help
> 
-- 
***********************************************************************
Christian Hennig
Seminar fuer Statistik, ETH-Zentrum (LEO), CH-8092 Zuerich (currently)
and Fachbereich Mathematik-SPST/ZMS, Universitaet Hamburg
hennig at stat.math.ethz.ch, http://stat.ethz.ch/~hennig/
hennig at math.uni-hamburg.de, http://www.math.uni-hamburg.de/home/hennig/
#######################################################################
ich empfehle www.boag.de

For Clustering validation it maybe good to refer to "On Clustering
Validation Techniques" by Maria Hakidi.  It presents a good survey on these
kind of techniques.  You can even find this an orticles on the subject here
http://www.db-net.aueb.gr/mhalk/Publ_maria.htm
______________
Eduardo Miranda
Departamento de Inform?tica da FCT/ UNL
Quinta da Torre, 2829-516 Caparica, Portugal
Tel: +351-21 294 85 36  - Ext. 10731
Fax: +351-21 294 85 41
E-mail: miranda at di.fct.unl.pt
http://ctp.di.fct.unl.pt/QUASAR
> Date: Fri, 31 Jan 2003 12:34:47 +0100 (CET)
> From: Christian Hennig <hennig at stat.math.ethz.ch>
> To: Francisco do Nascimento Junior <fnj at cin.ufpe.br>
> cc: R-help <R-help at stat.math.ethz.ch>
> Subject: Re: [R] Validation of clustering
>
> Hi,
>
> I am not really sure what you want to know.
> If you simply want to know how to find the resulting clustering, consider
> help(clara.object). For validation and assessment of the clustering, you
> might use a silhouette plot, see help(plot.partition),
> help(partition.object).
>
> For more descriptions consider the book of Kaufman and Rousseeuw; some
free
> material is on
> http://win-www.uia.ac.be/u/statis/index.html
> (Programs->Clustering)
>
> Best,
> Christian
>
> On Thu, 30 Jan 2003, Francisco do Nascimento Junior wrote:
>
> > Hi,
> > I'm using the library cluster to cluster a set of figures (method
CLARA).
> > Somebody that it work with clustering would know informs what I make
to
> > evaluate the clustering?
> >
> > Tks VM,
> > Francisco.
> > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> > Francisco J?nior,
> > Computer Science - UFPE-Brazil
> > "One life has more value that the
> > world whole"
> > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^