All SPR trees
AllSPR(parent, child, nEdge, notDuplicateRoot, edgeToBreak)the first column of the edge matrix of a tree of class phylo, i.e. tree$edge[, 1]
the second column of the edge matrix of a tree of class phylo, i.e. tree$edge[, 2]
integer specifying the number of edges of a tree of class phylo, i.e. dim(tree$edge)[1]
logical vector of length nEdge, specifying for each edge whether it is the second edge leading to the root (in which case its breaking will be equivalent to breaking the other root edge... except insofar as it moves the position of the root.)
(optional) integer specifying the index of an edge to bisect/prune,
generated randomly if not specified. Alternatively, set to -1 to return a complete list
of all trees one step from the input tree.
a list of edge matrices for all trees one SPR rearrangement from the starting tree