add_edge_df {DiagrammeR} | R Documentation |
With a graph object of class
dgr_graph
add edges from an edge data frame
to that graph.
add_edge_df(graph, edge_df)
graph |
a graph object of class
|
edge_df |
an edge data frame that is created
using |
a graph object of class dgr_graph
.
# Create a node data frame (ndf) ndf <- create_node_df( n = 4, type = "letter", color = c("red", "green", "grey", "blue"), value = c(3.5, 2.6, 9.4, 2.7)) # Create a graph with nodes and no edges graph <- create_graph(nodes_df = ndf) # Create an edge data frame (edf) edf <- create_edge_df( from = c(1, 2, 3), to = c(4, 3, 1), rel = "leading_to") # Add the edge data frame to the graph object to # create a graph with both nodes and edges graph <- graph %>% add_edge_df(edf) # Get the graph's edges to verify that the edge # data frame had been added get_edges(graph, return_type = "vector") #> [1] "1->4" "2->3" "3->1"