This function converts an object of class "birthdeath" to a vector with the ML birth & death rates.
Note that this is somewhat unnecessary as phytools now contains functions to fit birth-death and pure-birth diversification models from trees (fit.bd and fit.yule) that also take into account incomplete sampling fraction.
bd(x)object of class "birthdeath".
A vector.
Revell, L. J. (2012) phytools: An R package for phylogenetic comparative biology (and other things). Methods Ecol. Evol., 3, 217-223.