ancestral states of discrete characters failed, custom models
did not work, and the function failed with a null gradient (a
warning message is now returned; this latter bug was also
present in yule.cov() as well and is now fixed).
ancestral states of discrete characters failed, custom models
did not work, and the function failed with a null gradient (a
warning message is now returned; this latter bug was also
present in yule.cov() as well and is now fixed).