R help - Feb 2007 - cluster analysis under contiguity constraints with R ?

Hello,
 
    I would like to know if there is a function in an R library that 
allows to do cluster analysis under contiguity constraints ?
 
 
    Thank you very much for your answer !

    Lise Bellanger

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Lise Bellanger, 
Universit? de Nantes
D?partement de Math?matiques, Laboratoire Jean Leray UMR CNRS 6629 
2, Rue de la Houssini?re BP 92208 - F-44322 Nantes Cedex 03 
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On Fri, 2007-02-16 at 13:10 +0100, Bellanger Lise wrote:
> Hello,
>  
>     I would like to know if there is a function in an R library that 
> allows to do cluster analysis under contiguity constraints ?
>  
> 
>     Thank you very much for your answer !
> 
>     Lise Bellanger
Lise, 

One option might be some non-CRAN code from Steve Juggins. He has a
modified hclust (see ?hclust for details on this) that is designed to
work with samples that are ordered in some way. The type-use example
that Steve wrote it for is clustering samples in a lake sediment core,
where the samples are strictly ordered in time (depth) and you can only
fuse adjacent samples/groups.

If this is the sort of thing you meant, try:

http://www.campus.ncl.ac.uk/staff/Stephen.Juggins/analysis.htm

The function is chclust() in his in-development palaeo package.

G

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>>>>> On Fri, 16 Feb 2007 13:10:44 +0100,
>>>>> Bellanger Lise (BL) wrote:
  > Hello,
  >     I would like to know if there is a function in an R library that 
  > allows to do cluster analysis under contiguity constraints ?
 
I don't know what exactly you mean by "contiguity constraints",
but
package flexclust can cluster with group constraints, see

	http://www.ci.tuwien.ac.at/papers/Leisch+Gruen-2006.pdf

Hope this helps,
Fritz Leisch

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