Ancestors of an edge
Quickly identify edges that are 'ancestral' to a particular edge in a tree.
EdgeAncestry(edge, parent, child, stopAt = (parent == min(parent)))
edge |
Integer specifying the number of the edge whose child edges should be returned. |
parent |
Integer vector corresponding to the first column of the edge
matrix of a tree of class |
child |
Integer vector corresponding to the second column of the edge
matrix of a tree of class |
stopAt |
Integer or logical vector specifying the edge(s) at which to terminate the search; defaults to the edges with the smallest parent, which will be the root edges if nodes are numbered Cladewise or in Preorder. |
EdgeAncestry() returns a logical vector stating whether each edge
in turn is a descendant of the specified edge.
Martin R. Smith (martin.smith@durham.ac.uk)
Other tree navigation:
AncestorEdge(),
CladeSizes(),
DescendantEdges(),
EdgeDistances(),
ListAncestors(),
MRCA(),
NDescendants(),
NodeDepth(),
NodeOrder(),
NonDuplicateRoot(),
RootNode()
tree <- PectinateTree(6) plot(tree) ape::edgelabels() parent <- tree$edge[, 1] child <- tree$edge[, 2] EdgeAncestry(7, parent, child) which(EdgeAncestry(7, parent, child, stopAt = 4))
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