Hi Eric,
See the function rTraitCont in ape: the parameters of the BM or OU model
can be branch-specific, so it's easy to specify a change in parameter(s)
at a given node. There's an example there:
http://www.mpcm-evolution.org/practice/online-practical-material-chapter-13/chapter-13-2-traits
Cheers,
Emmanuel
Le 30/07/2015 11:31, Eric Lewitus a écrit :
Hello,
There are several functions available for simulating rate shifts in trees
(e.g., SimTree, TESS), but these implement tree-wide shifts, which are somewhat
unrealistic, rather than shifts descending from a particular node. Is it
possible to implement a more realistic rate shifted tree? Has such a thing
already been implemented?
Thanks.
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