siblings: Siblings of a node
In paulponcet/oak: Trees Creation and Manipulation

Description Usage Arguments Value Examples

The function siblings returns the siblings of a node in a given tree.

siblings(.node, .tree, include_node = FALSE)

## S3 method for class 'rtree'
siblings(.node, .tree, include_node = FALSE)

`.node`	node or character. The node or label of the node considered.
`.tree`	A tree.
`include_node`	logical. If `FALSE` (the default), the node `.node` is not included to the list of siblings.

A (possibly empty) list of nodes.

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

## Unrooted tree
(tr3 = r_(s = list(tr2, c_("Grand-Mother", "Father", "Son"))))
siblings("Alice", tr3) # note that in 'tr3', Alice and Grand-Mother are not siblings