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Download and run the R script and then reload this web page.

The R script used by this page is here: clusterexample.R.
The R language:
The websockets package for R from:
Clustering example adapted from: A Handbook of Statistical Analyses Using R by Brian S. Everitt and Torsten Hothorn,
Protovis by Michael Bostock, Jeffrey Heer:
Scatter plot idea from: Thiemo Mättig.