On Wed, May 2, 2018 at 2:53 PM, David Bapst <dwba...@tamu.edu> wrote:

> Given that your tree appears to be non-ultrametric enough to cause
> branching.times to throw some nonsensical node ages, if it is supposed
> to be ultrametric. I recommend checking it carefully to figure out why
> the tips seem to not quite be at the same distance from the root.
 Sometimes this happens with tree import from a file -- it could be a
newick tree with branch lengths precise to the hundredths but a lot of the
R  ultrametric tests by default use higher precision (1e-08, iirc).


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