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Re: Curious Cluster Analysis Conundrum [message #85232 is a reply to message #85231]

Wed, 17 July 2013 12:44

Bill Nel
Messages: 31
Registered: October 2010

Member

On Wednesday, July 17, 2013 3:03:14 PM UTC-4, jack.co...@nasa.gov wrote:
> I'm using
>
> iwts = CLUST_WTS(ibza,N_CLUSTERS=2)
> result = CLUSTER(ibza, iwts, n_clusters=2)
> ...
>
> So, I'm thinking that CLUSTER uses some kind of random seed, and sometimes it works, sometimes not?

Yep, see the documentation for CLUST_WT :-)

Note: Because the initial clusters are chosen randomly, your results may differ slightly each time the CLUST_WTS routine is invoked, even for the same input data. For data with well-defined clusters the differences should be slight. For randomly-scattered data (no distinguishable clusters), the results may be significantly different, which may indicate that k-means clustering is not appropriate for your data.

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[Message index]

		Curious Cluster Analysis Conundrum By: jack.connerney on Wed, 17 July 2013 12:03
		Re: Curious Cluster Analysis Conundrum By: Bill Nel on Wed, 17 July 2013 12:44
		Re: Curious Cluster Analysis Conundrum By: jack.connerney on Wed, 17 July 2013 12:54
		Re: Curious Cluster Analysis Conundrum By: Fabzi on Thu, 18 July 2013 07:48

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