DiagrammeR (version 1.0.9)

get_node_attrs: Get node attribute values

Description

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)

Value

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

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.

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)

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