[R] estimate the number of clusters

[Martin Maechler]

Ping,

you found another bug in silhouette.default() -- which can 
happen when there's one cluster with exactly one observation.

I'll let you know more, once I have a complete fix.

Martin Maechler <maechler at stat.math.ethz.ch>	http://stat.ethz.ch/~maechler/
Seminar fuer Statistik, ETH-Zentrum  LEO C16	Leonhardstr. 27
ETH (Federal Inst. Technology)	8092 Zurich	SWITZERLAND
phone: x-41-1-632-3408		fax: ...-1228			<><