mrca returns for each pair of tips (and nodes) its most
recent common ancestor (MRCA).
getMRCA returns the MRCA of two or more tips.
an object of class
a logical indicating whether to return the MRCAs among
all tips and nodes (if
a vector of mode numeric or character specifying the tips.
mrca, the diagonal is set to the number of the tips (and
full = TRUE). If
full = FALSE, the colnames and
rownames are set with the tip labels of the tree; otherwise the
numbers are given as names.
tip is of length one or zero then
NULL is returned.
a matrix of mode numeric (
mrca) or a single numeric value