[Taxacom] cladistics (was: clique analysis in textbooks)
sevragorgia at gmail.com
Fri Aug 19 13:32:23 CDT 2011
>Clustering is clustering is clustering. Group some things together and
you are clustering - however it is done.
no you are not. Grouping is not clustering, there are many ways to group
things together not involving clustering. Maximum parsimony, maximum
likelihood and bayesian analysis are not clustering. It is simply
incorrect to call to these methods clustering. When you run either of
the above analyses you are not clustering, despite the result being
something similar to a cluster. If you could reduce phylogenetic
inference to clustering everything would be so easy (computationally
speaking) because clustering can be done (computationally) efficiently
whereas searching for an optimal tree using phylogenetic methods cannot.
Taxa are only "clustered" (randomly or sequentially) together to build
the first tree, afterwards entire topologies are evaluated, taxa are not
clustered. This is so basic I cannot believe I am explaining it.
Sergio Vargas R., M.Sc.
Dept. of Earth& Environmental Sciences
tel. +49 89 2180 17929
s.vargas at lrz.uni-muenchen.de
sevra at marinemolecularevolution.org
check my webpage:
check my research ID:
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