parent: Parent of a node

In oak: Trees Creation and Manipulation

Description

The function parent returns the parent of a node in a given tree. If the node is not found in the tree or has no parent, the empty tree is returned.

Usage

parent(.node, .tree, degree = 1L)

## S3 method for class 'rtree'
parent(.node, .tree, degree = 1L)

has.parent(.node, .tree)

Arguments

.node	node or character. The node or node label considered.
.tree	A tree.
degree	integer. Currently not used.

Value

A node.

Examples

## Rooted tree
(tr0 = c_("Bob", "Carl", "Daniel"))
(tr1 = c_("Bill", "Caroline", "Dimitri", "Enoc"))
(tr2 = r_("Alice", s = list(tr0, tr1)))

## Unrooted tree
(tr3 = r_(s = list(tr2, c_("Son", "Father", "Grand-Mother"))))
parent("Alice", tr3)
parent("Bob", tr3)
parent("any node", tr3)

oak documentation built on May 1, 2019, 9:13 p.m.