delete_loop_edges_ws {DiagrammeR}

Delete all loop edges associated with a selection of nodes

Description

With a selection of nodes in a graph, remove any associated loop edges.

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().

Usage

delete_loop_edges_ws(graph)

Arguments

graph

A graph object of class dgr_graph.

Value

A graph object of class dgr_graph.

See Also

Other edge creation and removal: add_edge(), add_edge_clone(), add_edge_df(), add_edges_from_table(), add_edges_w_string(), add_forward_edges_ws(), add_reverse_edges_ws(), copy_edge_attrs(), create_edge_df(), delete_edge(), delete_edges_ws(), drop_edge_attrs(), edge_data(), join_edge_attrs(), mutate_edge_attrs(), mutate_edge_attrs_ws(), recode_edge_attrs(), rename_edge_attrs(), rescale_edge_attrs(), rev_edge_dir(), rev_edge_dir_ws(), set_edge_attr_to_display(), set_edge_attrs(), set_edge_attrs_ws()

Examples

# Create an undirected, full graph
# of 5 nodes with loops retained
graph <-
  create_graph(
    directed = FALSE) %>%
  add_full_graph(
    n = 5,
    keep_loops = TRUE)

# Select nodes `3` and `4`
# and remove the loop edges
# associated with those nodes
graph <-
  graph %>%
  select_nodes_by_id(
    nodes = 3:4) %>%
  delete_loop_edges_ws()

# Count the number of loop
# edges remaining in the graph
graph %>% count_loop_edges()