is_node_present {DiagrammeR} | R Documentation |
From a graph object of class
dgr_graph
, determine whether a
specified node is present.
is_node_present(graph, node)
graph |
a graph object of class
|
node |
either a node ID value or a node label to test for presence in the graph. |
a logical value.
# Create a simple graph with # a path of four nodes graph <- create_graph() %>% add_path( n = 4, type = "path", label = c( "one", "two", "three", "four")) # Determine if there is a node # with ID `1` in the graph graph %>% is_node_present(node = 1) # Determine if there is a node # with ID `5` in the graph graph %>% is_node_present(node = 5) # Determine if there is a node # with label `two` in the graph graph %>% is_node_present(node = "two")