Re: [R] cluster in R

From: Weiwei Shi <helprhelp_at_gmail.com>
Date: Wed 18 Oct 2006 - 15:36:28 GMT

Dear Christian:
This is really a good summary. Most of my prev experience was on classification instead of clustering and this is really a good start for me. Thank you!

And also hope someone can provide more info and answers to the other questions.

cheers,

weiwei

On 10/18/06, Christian Hennig <chrish@stats.ucl.ac.uk> wrote:
> Dear Weiwei,
>
> > 1. Is there a way of evaluate the effecitives (or seperation) of
> > clustering (rather than by visualization)?
>
> The function cluster.stats in package fpc computes several cluster
> validation statistics (among them the average silhouette width).
> Function clusterboot in the same package (recent version) assesses cluster
> stability. There are several interfaces to clustering methods implemented
> in R which are documented on the help page of kmeansCBI (which gives you
> kind of an overview of available "general purpose" clustering methods in R
> though I may have missed some).
> There are also several methods for the visualization of separation (I
> know that you didn't ask for that) for which the function plotcluster is
> an interface.
>
> Best,
> Christian
>
>
> *** --- ***
> Christian Hennig
> University College London, Department of Statistical Science
> Gower St., London WC1E 6BT, phone +44 207 679 1698
> chrish@stats.ucl.ac.uk, www.homepages.ucl.ac.uk/~ucakche
>

-- 
Weiwei Shi, Ph.D
Research Scientist
GeneGO, Inc.

"Did you always know?"
"No, I did not. But I believed..."
---Matrix III

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