[R] cluster analysis

[Gavin Simpson]

On Thu, 2007-11-01 at 08:19 -0800, amna khan wrote:
> Hi Sir
> 
> How can we select the optimum number of clusters?
> 
> Best Regards

There are many ways you could do this, some better than others. A key
factor is which method of "cluster analysis" are you using?

I'd suggest you read up about the clustering method you are using and
how to select the number of clusters from the results - a good book on
cluster analysis should help. Then come back to the list and ask us how
do I do "method x to find the number of clusters in clustering method y
using R?", if you haven't already worked it out by then, by using R's
search tools when you know what you want to do.

This is not a list for statistical help, but rather help with how to do
things in R.

And before you post again, please read the posting guide! The two emails
you fired off to the this list within 10 minutes of each other fall a
long way short of what is expected from you for a posting here.

G
-- 
%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%
 Dr. Gavin Simpson             [t] +44 (0)20 7679 0522
 ECRC, UCL Geography,          [f] +44 (0)20 7679 0565
 Pearson Building,             [e] gavin.simpsonATNOSPAMucl.ac.uk
 Gower Street, London          [w] http://www.ucl.ac.uk/~ucfagls/
 UK. WC1E 6BT.                 [w] http://www.freshwaters.org.uk
%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%