add_node {DiagrammeR} | R Documentation |
With a graph object of class
dgr_graph
, add a new node to the graph.
One can optionally provide node attributes
for the created node. There is also the
option to create edges to and from existing
nodes in the graph. Because new edges can
also be created through this function, there
is the possibility to set edge attributes
for any new graph edges.
add_node(graph, type = NULL, label = NULL, from = NULL, to = NULL, node_aes = NULL, edge_aes = NULL, node_data = NULL, edge_data = NULL)
graph |
a graph object of class
|
type |
an optional character object that acts as a group identifier for the node to be added. |
label |
an optional character object that describes the node. |
from |
an optional vector containing node IDs from which edges will be directed to the new node. |
to |
an optional vector containing node IDs to which edges will be directed from the new node. |
node_aes |
an optional list of named vectors
comprising node aesthetic attributes. The helper
function |
edge_aes |
an optional list of named vectors
comprising edge aesthetic attributes. The helper
function |
node_data |
an optional list of named vectors
comprising node data attributes. The helper
function |
edge_data |
an optional list of named vectors
comprising edge data attributes. The helper
function |
a graph object of class dgr_graph
.
# Create an empty graph and add 2 nodes by using # the `add_node()` function twice graph <- create_graph() %>% add_node() %>% add_node() # Get a count of all nodes # in the graph graph %>% count_nodes() # The nodes added were given # ID values `1` and `2`; obtain # the graph's node IDs graph %>% get_node_ids() # Add a node with a `type` # value defined graph <- graph %>% add_node(type = "person") # View the graph's internal # node data frame (ndf) graph %>% get_node_df()