DiagrammeR (version 0.8.1)

set_node_attr: Set node attributes

Description

From a graph object of class dgr_graph or a node data frame, set node attribute properties for one or more nodes.

Usage

set_node_attr(x, nodes = NULL, node_attr, values)

Arguments

x

either a graph object of class dgr_graph that is created using create_graph, or a node data frame.

nodes

an optional vector of node IDs for filtering list of nodes present in the graph.

node_attr

the name of the attribute to set.

values

the values to be set for the chosen attribute for the chosen nodes.

Value

• either a graph object of class dgr_graph or a node data frame, depending on what type of object was supplied to x.

Examples

# Create a simple graph
nodes <-
  create_nodes(nodes = c("a", "b", "c", "d"),
               type = "letter",
               label = TRUE,
               value = c(3.5, 2.6, 9.4, 2.7))

edges <-
  create_edges(from = c("a", "b", "c"),
               to = c("d", "c", "a"),
               rel = "leading_to")

graph <-
  create_graph(nodes_df = nodes,
               edges_df = edges)

# Set attribute 'color = "green"' for nodes "a" and "c" using
# the graph object
graph <-
  set_node_attr(x = graph, nodes = c("a", "c"),
                node_attr = "color", values = "green")

# Set attribute 'color = "green"' for nodes "a" and "c" using
# the node data frame
nodes <-
  set_node_attr(x = nodes, nodes = c("a", "c"),
                node_attr = "color", values = "green")

#' # Set attribute 'color = "blue"' for all nodes
# the node data frame
nodes <-
  set_node_attr(x = nodes, node_attr = "color", values = "blue")