set_node_attr_w_fcn {DiagrammeR} | R Documentation |
From a graph object of class
dgr_graph
or a node data frame, set node
attribute properties for all nodes in the graph
using one of several whole-graph functions.
set_node_attr_w_fcn(graph, node_attr_fcn, ..., column_name = NULL)
graph |
a graph object of class
|
node_attr_fcn |
the name of the function to
use for creating a column of node attribute values.
Valid functions are: |
... |
arguments and values to pass to
the named function in |
column_name |
an option to supply a column
name for the new node attribute column. If
|
either a graph object of class
dgr_graph
.
# Create a random graph using the # `add_gnm_graph()` function graph <- create_graph() %>% add_gnm_graph( n = 10, m = 22, set_seed = 23) %>% set_node_attrs( node_attr = value, values = rnorm( n = count_nodes(.), mean = 5, sd = 1) %>% round(1)) # Get the betweenness values for # each of the graph's nodes as a # node attribute graph_1 <- graph %>% set_node_attr_w_fcn( node_attr_fcn = "get_betweenness") # Inspect the graph's internal # node data frame graph_1 %>% get_node_df() # If a specified function takes argument # values, these can be supplied as well graph_2 <- graph %>% set_node_attr_w_fcn( node_attr_fcn = "get_alpha_centrality", alpha = 2, exo = 2) # Inspect the graph's internal # node data frame graph_2 %>% get_node_df() # The new column name can be provided graph_3 <- graph %>% set_node_attr_w_fcn( node_attr_fcn = "get_pagerank", column_name = "pagerank") # Inspect the graph's internal # node data frame graph_3 %>% get_node_df() # If `graph_3` is modified by # adding a new node then the column # `pagerank` will have stale data; we # can run the function again and re-use # the existing column name to provide # updated values graph_3 <- graph_3 %>% add_node( from = 1, to = 3) %>% set_node_attr_w_fcn( node_attr_fcn = "get_pagerank", column_name = "pagerank") # Inspect the graph's internal # node data frame graph_3 %>% get_node_df()