get_node_attrs {DiagrammeR} | R Documentation |
From a graph object of class
dgr_graph
or a node data frame, get node
attribute values for one or more nodes.
get_node_attrs(x, node_attr, nodes = NULL)
x |
either a graph object of class
|
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. |
a named vector of node attribute values for
the attribute given by node_attr
by node ID.
library(magrittr) # With the `create_random_graph()` function, get # a simple graph with a node attribute called # `value` random_graph <- create_random_graph( n = 4, m = 4, directed = TRUE, fully_connected = TRUE, set_seed = 20) # Get all of the values from the `value` node # attribute as a named vector random_graph %>% get_node_attrs("value") #> 1 2 3 4 #> 9.0 8.0 3.0 5.5 # To only return node attribute values for specified # nodes, use the `nodes` argument random_graph %>% get_node_attrs("value", nodes = c(1, 3)) #> 1 3 #> 9 3