Dear all,
I am fitting a BM model using fitContinuous, a vector of trait values and a
time-calibrated tree and then I use the sigsq parameter as my measure of
the rate of evolution of the trait in question. My questions are:
(1) what is the unit of the sigsq parameter?
(2) to what extent is the sigsq in a BM model comparable to sigsq in an OU
model, for instance? are they on the same units?
Thanks!
Karla
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