get_node_attrs: Get node attribute values

Description Usage Arguments Value Examples

View source: R/get_node_attrs.R

Description

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

Usage

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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

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# Create a random graph and
# incorporate the node attribute
# called `value`
graph <-
  create_random_graph(
    n = 4, m = 4,
    set_seed = 23)

# 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
#> 6.0 2.5 3.5 7.5

# 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
#> 6.0 3.5

DiagrammeR documentation built on Sept. 7, 2017, 1:06 a.m.