Hey Christian, That clarifies a lot of things. Thank you.
With regards, Arnav ----- Original Message ----- From: "Christian Hennig" <[EMAIL PROTECTED]> To: "Arnav Sheth" <[EMAIL PROTECTED]> Cc: "Uwe Ligges" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: Thursday, February 05, 2004 8:02 AM Subject: Re: [R] Clustering with 'agnes' > Hi, > > the underlying principle of hierarchical clustering is *not* that the > clusters can be represented by some centroid points. Most methods are > distance based, i.e. they can be calculated also in absence of any R^p > representation of the points. > > If you want to recover centroids, you should do kmeans, normal mixture > clustering (mclust) or pam/clara. Of course you can also take the points > belonging to an agnes cluster and compute the mean vector (or any other > summary statistic), but that's not what hierarchical clustering is > meant to do (it may be reasonable with Ward's method, though). > > Christian > > On Wed, 4 Feb 2004, Arnav Sheth wrote: > > > > > Hi Uwe, > > > > Thanks for the tip. I already have row labels. My problem is, (referring to the > > example below) how can I get R to tell me that upto three clusters, the points > > are clustered around (0,0), (1,0) and (0,1)? > > > > Perhaps it is not even possible, I am not sure. > > > > With regards, > > Arnav > > *********************************************************************** > Christian Hennig > Fachbereich Mathematik-SPST/ZMS, Universitaet Hamburg > [EMAIL PROTECTED], http://www.math.uni-hamburg.de/home/hennig/ > ####################################################################### > ich empfehle www.boag-online.de > > ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
