View source: R/select_edges_by_node_id.R
select_edges_by_node_id | R Documentation |
Select edges in a graph object of class dgr_graph
using node ID values. All
edges associated with the provided nodes will be included in the selection.
select_edges_by_node_id(graph, nodes, set_op = "union")
graph |
A graph object of class |
nodes |
A vector of node IDs for the selection of edges present in the graph. |
set_op |
The set operation to perform upon consecutive selections of
graph edges This can either be as a |
A graph object of class dgr_graph
.
# Create a graph with 5 nodes
graph <-
create_graph() %>%
add_path(n = 5)
# Create a graph selection by selecting edges
# associated with nodes `1` and `2`
graph <-
graph %>%
select_edges_by_node_id(
nodes = 1:2)
# Get the selection of edges
graph %>% get_selection()
# Perform another selection of edges, with nodes
# `1`, `2`, and `4`
graph <-
graph %>%
clear_selection() %>%
select_edges_by_node_id(
nodes = c(1, 2, 4))
# Get the selection of edges
graph %>% get_selection()
# Get a fraction of the edges selected over all
# the edges in the graph
graph %>%
{
l <- get_selection(.) %>%
length(.)
e <- count_edges(.)
l/e
}
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