Get distance of a node to an ancestor node

Get the distance of a node to another node in the tree

get_node_distance(node, ancestor_node)

Arguments

node, ancestor_node

node, ancestor_node	An object of class `ExplorerNode`. If `node` is the ancestor node, `0` is returned. If `ancestor_node` is no ancestor of `node`, `NULL` is returned.

An object of class ExplorerNode.

If node is the ancestor node, 0 is returned. If ancestor_node is no ancestor of node, NULL is returned.