Greetings,
I would like to implement a "flexible beta" heirarchical agglomerative
clustering method in Splus (version 6.0 running Windows 98). Two versions
have been proposed: a weighted averages method (Lance and Williams 1967
[this has been implemented in SAS Proc Cluster]), and an unweighted/group
average method (Belbin et al. 1992). I am most interested in the latter
group average method (also called UPGMA). Has S code been written to
implement these clustering methods, and is such code available?
Thanks!
Erik Silldorff
Department of Ecology, Evolution, and Marine Biology
University of California, Santa Barbara
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Lance, G.N. and W.T. Williams. 1966. A general theory of classificatory
sorting strategies: I. Hierarchical systems. Computer Journal 9: 373-380.
Belbin, L., D.P. Faith, and G.W. Milligan. 1992. A comparison of two
approaches to beta-flexible clustering. Multivariate Behavioral Research
27(3): 417-433.
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