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Re: Cluster analysis [message #41786 is a reply to message #11153]

Tue, 07 December 2004 11:32

Chris[2]
Messages: 39
Registered: August 2003

Member

Hi Harald,

Have you tried the new CLUSTER_TREE and DENDROGRAM/DENDRO_PLOT routines,
which were introduced in IDL6.1? These give better control over which method
is used to cluster, and might work well for your data.

Cheers,

Chris
Research Systems, Inc.

"Harald" <hfrey@ssl.berkeley.edu> wrote in message
news:51c9fb99.0412021550.41c2d53d@posting.google.com...
> The cluster analysis in IDL with clust_wts and cluster finds only 8
> useful clusters. I can set n_clusters to a greater number, however all
> cluster more than 8 useful ones are at locations, that do not contain
> any of the samples. Is there any statistical reason that the number of
> clusters can never exceed 8?
>
> I have a data set with 24 variables and 7680 samples and would expect
> that I can easily find 20 or so different clusters.
>
> Does anybody have better IDL software that does the cluster analysis
> properly?
>
> Thank you,
> Harald (hfrey@ssl.berkeley.edu)

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[Message index]

		Cluster analysis By: mph410 on Fri, 27 February 1998 00:00
		Re: Cluster analysis By: David Foster on Mon, 09 March 1998 00:00
		Re: Cluster analysis By: Chris[2] on Tue, 07 December 2004 11:32
		Re: Cluster analysis By: Harald Frey on Mon, 06 December 2004 14:21
		Re: Cluster analysis By: George N. White III on Sun, 05 December 2004 06:43
		Re: Cluster analysis By: Chris.Jacobsen on Fri, 03 December 2004 15:30
		Re: Cluster analysis By: James Kuyper on Fri, 03 December 2004 06:44

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