Get node attribute values — get_node

From a graph object of class dgr_graph, get node attribute values for one or more nodes.

Usage

get_node_attrs(graph, node_attr, nodes = NULL)

Arguments

graph: A graph object of class dgr_graph.
node_attr: The name of the attribute for which to get values.
nodes: An optional vector of node IDs for filtering list of nodes present in the graph or node data frame.

Value

A named vector of node attribute values for the attribute given by node_attr by node ID.

Examples

# Create a random graph using the
# `add_gnm_graph()` function
graph <-
  create_graph() %>%
  add_gnm_graph(
    n = 4,
    m = 4,
    set_seed = 23) %>%
  set_node_attrs(
    node_attr = value,
    values = c(2.5, 8.2, 4.2, 2.4))

# Get all of the values from
# the `value` node attribute
# as a named vector
graph %>%
  get_node_attrs(
    node_attr = value)
#>   1   2   3   4 
#> 2.5 8.2 4.2 2.4 

# To only return node attribute
# values for specified nodes,
# use the `nodes` argument
graph %>%
  get_node_attrs(
    node_attr = value,
    nodes = c(1, 3))
#>   1   3 
#> 2.5 4.2