Thanks, Liam!

Just a quick follow-up question: in the example I saw on your webpage (with
three clades, one of which with a higher rate), how would you go about a
sort of "post-hoc" test to determine which clades differ significantly from
one another in their rates?


On Sat, Jul 22, 2017 at 4:13 PM, Liam J. Revell <> wrote:

> Hi Karla.
> phytools has a function called ratebytree for this. This essentially
> corresponds to the 'censored' model of O'Meara et al. 2006, but we also
> have a submitted manuscript describing it. I can send you that in a second
> email.
> For more information about using the function you can search for
> 'ratebytree' on my blog,
> All the best, Liam
> Liam J. Revell, Associate Professor of Biology
> University of Massachusetts Boston
> web:
> email:
> blog:
> On 7/22/2017 3:10 PM, Karla Shikev wrote:
>> Dear all,
>> I'd like to test whether the rate of evolution of a phenotypic trait (e.g.
>> body size) is significantly different among distantly-related clades (e.g.
>> mammals vs birds). I got tip data and completely resolved and callibrated
>> trees. One possibility would be to estimate rates and their confidence
>> intervals for each clade and to compare them directly, but I'm sure
>> there's
>> a more elegant way to do this.
>> Karla
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