Karla,
The units of sigsq are in your trait units^2 per time unit of your
phylogeny. So if your trait is in cm and your phylogeny in millions of
years, then the units of sigsq are in cm^2/my.
Comparing BM to OU units is more complicated. Gene Hunt discussed this
in the following paper:
http:
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 s
