BFS traversal using the parent column to collect every node
descended from the given starting nodes.
Usage
.get_all_descendants(node_dat, nodenums)
Arguments
- node_dat
data.frame with at least nodenum and
parent columns.
- nodenums
Integer vector of node IDs whose descendants
to find.
Value
Integer vector of descendant node IDs (not including
the starting nodes themselves). Empty integer vector if no
descendants exist.