edge_count {DiagrammeR} | R Documentation |
From a graph object of class
dgr_graph
, get a count of edges in the graph
and optionally obtain a count of edges by their
relationship type.
edge_count(graph, rel = FALSE)
graph |
a graph object of class
|
rel |
either a logical value, where |
a numeric vector of single length.
# Create a node data frame (ndf) nodes <- create_nodes( nodes = LETTERS, label = TRUE, type = c(rep("a_to_g", 7), rep("h_to_p", 9), rep("q_to_x", 8), rep("y_and_z", 2))) # Create an edge data frame (edf) edges <- create_edges( from = sample(LETTERS, replace = TRUE), to = sample(LETTERS, replace = TRUE), rel = c(rep("rel_a", 7), rep("rel_b", 9), rep("rel_c", 8), rep("rel_d", 2))) # Create a graph using the ndf and edf graph <- create_graph( nodes_df = nodes, edges_df = edges) # Get a total count of edges in the graph edge_count(graph, rel = FALSE) #> [1] 26 # Get a count of edges that have the relationship # `rel_a` edge_count(graph, rel = "rel_a") #> [1] 7 # Get a count of edges with relationships # `rel_a` and `rel_b` edge_count(graph, rel = c("rel_a", "rel_b")) #> [1] 16