R help - Jul 2007 - Cluster prediction from factor/numeric datasets

Hi all,

I have a dataset with numeric and factor columns of data which I developed a
Gower Dissimilarity Matrix for (Daisy) and used Agglomerative Nesting
(Agnes) to develop 20 clusters.

I would like to use the 20 clusters to determine cluster membership for a
new dataset (using predict) but cannot find a way to do this (no way to
"predict" in the cluster package).

I know I can use "predict" in cclust, kcca, and flexclust- but these
algorithms do not permit factor data or use a Gower dissimilarity matrix, so
are unusable to me.

Any suggestions?

Thanks in advance,

Scott

Scott Bearer, Ph.D.
Forest Ecologist
The Nature Conservancy
  in Pennsylvania
Community Arts Center
220 West Fourth Street, 3rd Floor
Williamsport, PA  17701

Scott:

Suggest you look at using Discrimnant Analysis (don't know which R
package has it). 
Take the Clusters created, using Discrimnant Analysis, Get Fisher Scores
for the clusters.
Then you can take new dataset applying fisher scores to see what which
defined cluster the new dataset
will be classified into.

Neil 

-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Scott Bearer
Sent: Monday, July 23, 2007 1:39 PM
To: r-help at stat.math.ethz.ch
Subject: [R] Cluster prediction from factor/numeric datasets

Hi all,

I have a dataset with numeric and factor columns of data which I
developed a Gower Dissimilarity Matrix for (Daisy) and used
Agglomerative Nesting
(Agnes) to develop 20 clusters.

I would like to use the 20 clusters to determine cluster membership for
a new dataset (using predict) but cannot find a way to do this (no way
to "predict" in the cluster package).

I know I can use "predict" in cclust, kcca, and flexclust- but these
algorithms do not permit factor data or use a Gower dissimilarity
matrix, so are unusable to me.

Any suggestions?

Thanks in advance,

Scott

Scott Bearer, Ph.D.
Forest Ecologist
The Nature Conservancy
  in Pennsylvania
Community Arts Center
220 West Fourth Street, 3rd Floor
Williamsport, PA  17701

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