I do not know offhand whether there is an R implementation, but how about Mark Pagel's 1994 method for testing whether two 0/1 characters changing along a ohylogeny are changing independently?
J.F. ----- j...@gs.washington.edu Joe Felsenstein, Department of Genome Sciences and Department of Biology Box 355065, University of Washington, Seattle, WA 98195-5065 [[alternative HTML version deleted]] _______________________________________________ R-sig-phylo mailing list - R-sig-phylo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-phylo Searchable archive at http://www.mail-archive.com/r-sig-phylo@r-project.org/