Hi all,
Thank you for your help, I resolve my first problem (tree
convert to matrix) and the second one I think I must to calculate the
gamma-statistics with the ultrametric tree.
Thank you people,
Cheers
Bryan Morales Pallero
Licenciado en Biología
Biólogo
Laboratorio de Diversidad Genómica y Filoinformática
Facultad de Ciencias Naturales y Oceanográficas
Universidad de Concepción
Concepción - Chile
On 03/12/10 03:45, Joe Felsenstein wrote:
Folks --
Now that I have had a chance to look up the history:
1. Sokal and Rohlf in 1962 (in Taxon) introduced the
cophenetic correlation.
2. They had a distance called the "dendrogrammatic
distance" which was (for the ultrametric trees they
considered), half of the patristic distance.
3. Wartren Wagner mentions patristic distance
in a 1968 review in Bioscience, but does not
claim it.
4. JS Farris's paper showing that the cophenetic
correlation is minimized when we achieve a least
squares fit of tree to distances is in 1969 in
Systematic Zoology.
Joe
----
Joe Felsenstein, j...@gs.washington.edu
Dept. of Genome Sciences, Univ. of Washington
Box 355065, Seattle, WA 98195-5065 USA
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