default_validate_tree() ensures that a tree is acyclic,
loop-free, single-edged, connected, directed, and single-rooted with edge
direction from child to parent.
Usage
default_validate_tree(tree)
Arguments
- tree
igraph directed graph that is a valid single-rooted in-tree
and whose vertex names are keys from the data set
Value
single root vertex identifier if tree is valid; stops otherwise
Examples
default_validate_tree(wbs_tree)
#> top
#> 2