Hi AnneMarie, I dont really know if this makes sense; in fact ancestral state reconstruction is an ** a posteriori estimation ** of nodal values starting from tips observations.
A trick could be to add a false taxon lnked to that node and giving to it a 0 branch length (i.e. plitomized - you can then resolve this during computation using multi2di() ) and assigning your desired trait value. I'm not sure if this helps.... Best Paolo Dear phylo-sig list people, I want to do ancestral state reconstruction (preferably with ace) with one (or more) of the internal nodes 'fixed' for a range / a distribution of values. For instance, I want a node leading to one particular clade that is present a subset of my trees to have a value from 0.2-0.5, and then do the ancestral state reconstruction with this restriction on that node. I have been searching the archives and the net for discussion of this (but maybe with the wrong search terms), and I cannot find anything about it - not how to do it in R or in any other package. Thanks for your input! Annemarie -- Annemarie Verkerk, MA Evolutionary Processes in Language and Culture (PhD student) Max Planck Institute for Psycholinguistics P.O. Box 310, 6500AH Nijmegen, The Netherlands +31 (0)24 3521 185 http://www.mpi.nl/research/research-projects/evolutionary-processes _______________________________________________ R-sig-phylo mailing list R-sig-phylo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-phylo _______________________________________________ R-sig-phylo mailing list R-sig-phylo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-phylo
