Quickly identify edges that are "descended" from edges in a tree.
DescendantEdges(edge = NULL, parent, child, nEdge = length(parent))AllDescendantEdges(parent, child, nEdge = length(parent))
DescendantEdges() returns a logical vector stating whether each
edge in turn is a descendant of the specified edge (or the edge itself).
AllDescendantEdges() returns a matrix of class logical, with row
N specifying whether each edge is a descendant of edge N
(or the edge itself).
Integer specifying the number of the edge whose child edges are
required (see edgelabels()).
Integer vector corresponding to the first column of the edge
matrix of a tree of class phylo, i.e. tree[["edge"]][, 1]
Integer vector corresponding to the second column of the edge
matrix of a tree of class phylo, i.e. tree[["edge"]][, 2].
number of edges (calculated from length(parent) if not
supplied).
The order of parameters in DescendantEdges() will change in the future,
to allow AllDescendantEdges() to be merged into this function
(#31).
Please explicitly name the edge parameter in DescendantEdges(), and
replace AllDesdendantEdges() with DescendantEdges(edge = NULL),
to future-proof your code.
Other tree navigation:
AncestorEdge(),
CladeSizes(),
EdgeAncestry(),
EdgeDistances(),
ListAncestors(),
MRCA(),
NDescendants(),
NodeDepth(),
NodeOrder(),
NonDuplicateRoot(),
RootNode()