parents: Get parents of nodes in a 'caugi'

In caugi: Causal Graph Interface

Get parents of nodes in a caugi

Description

Get parents of nodes in a graph (nodes with directed edges pointing INTO the target node). This is equivalent to neighbors(cg, nodes, mode = "in").

Note that not both nodes and index can be given.

Usage

parents(cg, nodes = NULL, index = NULL)

Arguments

cg	A caugi object.
nodes	A character vector of node names.
index	A vector of node indexes.

Value

Either a character vector of node names (if a single node is requested) or a list of character vectors (if multiple nodes are requested).

See Also

Other queries: ancestors(), anteriors(), children(), components(), descendants(), districts(), edge_types(), edges(), exogenous(), is_acyclic(), is_admg(), is_ag(), is_caugi(), is_cpdag(), is_dag(), is_empty_caugi(), is_mag(), is_mpdag(), is_pdag(), is_simple(), is_ug(), m_separated(), markov_blanket(), neighbors(), nodes(), posteriors(), same_nodes(), spouses(), subgraph(), topological_sort()

Examples

cg <- caugi(
  A %-->% B,
  B %-->% C,
  class = "DAG"
)
parents(cg, "A") # NULL
parents(cg, index = 2) # "A"
parents(cg, "B") # "A"
parents(cg, c("B", "C"))
#> $B
#> [1] "A"
#>
#> $C
#> [1] "B"

caugi documentation built on Oct. 28, 2026, 1:07 a.m.