Re: [R-sig-phylo] understanding variance-covariance matrix

2018-08-27 Thread Theodore Garland
I just wanted to clarify one thing. Agus wrote: " Under the case of phylo dependence, all off-diagonal values are expected to be non zero " That is incorrect for species on opposite sides of the root of the phylogenetic tree, as they have zero shared phylogenetic history in the context of the

Re: [R-sig-phylo] understanding variance-covariance matrix

2018-08-27 Thread Agus Camacho
Many thanks to all for your very helpful references, commands and examples. For the sake of future readers, a summary of the off-list discussions and further reading. Andrew Hipp provided a very didactic way to look at the vcv matrix as a triangular distance matrix library(geiger) tr <-

Re: [R-sig-phylo] Aligning tree tip labels together in ape

2018-08-27 Thread Carleson, Nick
Hello, I used the code insertion that Emmanuel provided, and that solved my issue. Thank you all for the help and discussion! Pascal, if you're looking for a tutorial, this is the first one I found when I started: http://www.phytools.org/eqg/Exercise_3.2/ I've found it *very* helpful. I've also