Get all neighbors of one or more nodes

Description

With one or more nodes, get the set of all neighboring nodes.

Usage

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get_nbrs(graph, nodes)

Arguments

graph

a graph object of class dgr_graph.

nodes

a vector of node ID values.

Value

a vector of node ID values.

Examples

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# Create a simple, directed graph with 5
# nodes and 4 edges
graph <-
  create_graph() %>%
  add_path(5)

# Find all neighbor nodes for node `2`
graph %>% get_nbrs(2)
#> [1] 1 3

# Find all neighbor nodes for nodes `1`
# and `5`
graph %>% get_nbrs(c(1, 5))
#> [1] 2 4

# Color node `3` with purple, get its
# neighbors and color those nodes green
graph <-
  graph %>%
  select_nodes_by_id(3) %>%
  set_node_attrs_ws("color", "purple") %>%
  clear_selection() %>%
  select_nodes_by_id(get_nbrs(., 3)) %>%
  set_node_attrs_ws("color", "green")

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