DiagrammeR (version 0.8.1)

add_node_df: Add nodes from a node data frame to an existing graph object

Description

With a graph object of class dgr_graph add nodes from a node data frame to that graph.

Usage

add_node_df(graph, node_df)

Arguments

graph

a graph object of class dgr_graph that is created using create_graph.

node_df

a node data frame that is created using create_nodes.

Value

• a graph object of class dgr_graph.

Examples

# Create an empty graph
graph <- create_graph()

# Create a node data frame
nodes <-
  create_nodes(nodes = c("a", "b", "c", "d"),
               type = "letter",
               color = c("red", "green", "grey", "blue"),
               value = c(3.5, 2.6, 9.4, 2.7))

# Add the node data frame to the graph object to create a
# graph with nodes
graph <- add_node_df(graph = graph, node_df = nodes)

get_node_df(graph)
#>   nodes   type label color value
#> 1     a letter     a   red   3.5
#> 2     b letter     b green   2.6
#> 3     c letter     c  grey   9.4
#> 4     d letter     d  blue   2.7

# Create another node data frame
nodes_2 <-
  create_nodes(nodes = c("e", "f", "g", "h"),
               type = "letter",
               color = c("white", "brown", "aqua", "pink"),
               value = c(1.6, 6.4, 0.8, 4.2))

# Add the second node data frame to the graph object to
# add more nodes with attributes to the graph
graph <- add_node_df(graph = graph, node_df = nodes_2)

get_node_df(graph)
#>   nodes   type label color value
#> 1     a letter     a   red   3.5
#> 2     b letter     b green   2.6
#> 3     c letter     c  grey   9.4
#> 4     d letter     d  blue   2.7
#> 5     e letter     e white   1.6
#> 6     f letter     f brown   6.4
#> 7     g letter     g  aqua   0.8
#> 8     h letter     h  pink   4.2