Identify descendant edges

Quickly identify edges that are "descended" from edges in a tree.

DescendantEdges(parent, child, edge = NULL, nEdge = length(parent))

AllDescendantEdges(parent, child, nEdge = length(parent))

Arguments

parent

Integer vector corresponding to the first column of the edge matrix of a tree of class phylo, i.e. tree[["edge"]][, 1]

child

Integer vector corresponding to the second column of the edge matrix of a tree of class phylo, i.e. tree[["edge"]][, 2].

edge

Integer specifying the number of the edge whose child edges are required (see edgelabels()).

nEdge

number of edges (calculated from length(parent) if not supplied).

Value

DescendantEdges() returns a logical vector stating whether each edge in turn is a descendant of the specified edge (or the edge itself).

AllDescendantEdges() is deprecated; use DescendantEdges()

instead. It returns a matrix of class logical, with row N specifying whether each edge is a descendant of edge N (or the edge itself).

See also

Other tree navigation: AncestorEdge(), CladeSizes(), EdgeAncestry(), EdgeDistances(), ListAncestors(), MRCA(), NDescendants(), NodeDepth(), NodeOrder(), RootNode()