[R] Goodness of fit for hclust?

[Gavin Simpson]

On Tue, 2007-05-22 at 00:35 +0000, dhinds at sonic.net wrote:
> I'd like to get a measure of goodness of fit for a heirarchical
> clustering result from hclust.  Something that would indicate the
> extent to which the dendrogram accurately represents the original
> dissimilarity matrix.  Is there an easy way to do this?
> 
> Or, does anyone have code for computing distances between nodes given
> an hclust structure?  So far, my searches have come up dry.
> 
> -- David Hinds

Try ?cophenetic which calculates the cophenetic distances of a
hierarchical cluster analysis. The example on that help page shows how
to use the function to get the correlation between the original
distances and cophenetic distances.

HTH

G

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Gavin Simpson                     [t] +44 (0)20 7679 0522
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