Hi Sereina,
You should not get that error message when you do not specify a prior
- but if you do can you let me know.
For the prior you specified you get the error message because
us(trait):units is specifying a 3x3 covariance matrix, and yet your
prior, R=list(V=1,nu=0.002), is
My goal, it seems to me, is to get a bunch of replications of data in which one
trait shows a phylogenetic signal, but the other one does not, but also that
both share some predefined correlation with each other (over time). I can then
test different kinds of methods to see which would be most
