ancestors: Get the ancestors of a node
In jiho/checkboxTreeInput: A Tree-like Input with Checkboxes for Shiny Apps

Get the ancestors of a node

1	ancestors(id, tree, n = Inf)

`id`	numeric ids of nodes.
`tree`	a `treedf` data.frame, with columns `id` and `parent_id` at least.
`n`	number of levels to look up; n=1 gives the parent, n=2 gives the grand-parent, etc.

A vector of ids of the ancestors of the focus node(s).

tree <- data.frame(id=c(1, 2, 3, 4), parent_id=c(NA, 1, 2, 2))
ancestors(3, tree)
ancestors(3, tree, n=1)
ancestors(c(1,4), tree)

jiho/checkboxTreeInput documentation built on June 13, 2020, 10:29 a.m.

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