DiagrammeR (version 1.0.5)

delete_nodes_ws: Delete all nodes in a node selection

Description

In a graph object of class dgr_graph, delete all nodes present in a selection of nodes.

Usage

delete_nodes_ws(graph)

Arguments

graph

A graph object of class dgr_graph.

Value

A graph object of class dgr_graph.

Details

This function makes use of an active selection of nodes (and the function ending with _ws hints at this).

Selections of nodes can be performed using the following node selection (select_*()) functions: select_nodes(), select_last_nodes_created(), select_nodes_by_degree(), select_nodes_by_id(), or select_nodes_in_neighborhood().

Selections of nodes can also be performed using the following traversal (trav_*()) functions: trav_out(), trav_in(), trav_both(), trav_out_node(), trav_in_node(), trav_out_until(), or trav_in_until().

Examples

# NOT RUN {
# Create a graph with 3 nodes
graph <-
  create_graph() %>%
  add_n_nodes(n = 3) %>%
  add_edges_w_string(
    edges = "1->3 1->2 2->3")

# Select node with ID `1`
graph <-
  graph %>%
  select_nodes_by_id(nodes = 1)

# Delete node in selection (this
# also deletes any attached edges)
graph <-
  graph %>%
  delete_nodes_ws()

# Get a count of nodes in the graph
graph %>% count_nodes()

# }