o The new function yule.time fits a user-defined time-dependent
Yule model by maximum likelihood.
+ o The new function makeNodeLabel creates and/or modifies node
+ labels in a flexible way.
+
+
+BUG FIXES
+
+ o drop.tip() shuffled tip labels in some cases.
+
+ o drop.tip() did not handle node.label correctly.
+
+ o is.ultrametric() now checks the ordering of the edge matrix.
+
+ o ace() sometimes returned negative values of likelihoods of
+ ancestral states (thanks to Dan Rabosky for solving this long
+ lasting bug).
+
+
+OTHER CHANGES
+
+ o The data set xenarthra has been removed.
+
CHANGES IN APE VERSION 2.2-4