[R] Time-Ordered Clustering

Ingmar Visser i.visser at uva.nl
Fri Mar 13 10:45:45 CET 2009

Dear Paul,

Could you be more specific about what you mean here?
I don't know the Runger paper so it's hard to tell what it is that
you're looking for.

Blatant plug: I developed a package for hidden Markov models
called depmixS4 that in some sense does what you want: clustering
taking dependencies over time into account by specifying a
transition matrix.

Similarly, there are other packages that fit similar models, searching
for hidden markov model provides a number of them.

hth, Ingmar Visser

On 12 Mar 2009, at 23:39, Prew, Paul wrote:

> Hello All,
> Does anyone know of a package that performs constraint-based clusters?
> Ideally the package could perform "Time-Ordered Clustering", a  
> technique
> applied in a recent journal article by Runger, Nelson, Harnish  
> (using MS
> Excel). Quote, "in our specific implementation of constrained
> clustering, the clustering algorithm remains agglomerative and
> hierarchical, but observations or clusters are constrained to only  
> join
> if they are adjacent in time."  CRAN searches using variants of
> "cluster" and/or "constraint" and/or "time" etc. didn't yield  
> anything I
> could recognize.
> Thank you,
> Paul
> Paul Prew
> Ecolab
> Eagan, MN
> paul.prew at ecolab.com
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