These functions lets the user query whether the edges in a graph is of a specific type. All functions return a logical vector giving whether each edge in the graph corresponds to the specific type.

edge_is_multiple()

edge_is_loop()

edge_is_mutual()

edge_is_from(from)

edge_is_to(to)

edge_is_between(from, to, ignore_dir = !graph_is_directed())

edge_is_incident(i)

Arguments

from, to, i

A vector giving node indices

ignore_dir

Is both directions of the edge allowed

Value

A logical vector of the same length as the number of edges in the graph

Functions

  • edge_is_multiple: Query whether each edge has any parallel siblings

  • edge_is_loop: Query whether each edge is a loop

  • edge_is_mutual: Query whether each edge has a sibling going in the reverse direction

  • edge_is_from: Query whether an edge goes from a set of nodes

  • edge_is_to: Query whether an edge goes to a set of nodes

  • edge_is_between: Query whether an edge goes between two sets of nodes

  • edge_is_incident: Query whether an edge goes from or to a set of nodes

Examples

create_star(10, directed = TRUE, mutual = TRUE) %>% activate(edges) %>% sample_frac(0.7) %>% mutate(single_edge = !edge_is_mutual())
#> `.env` is deprecated and no longer has any effect
#> # A tbl_graph: 10 nodes and 13 edges #> # #> # A directed simple graph with 1 component #> # #> # Edge Data: 13 x 3 (active) #> from to single_edge #> <int> <int> <lgl> #> 1 2 1 TRUE #> 2 1 3 FALSE #> 3 3 1 FALSE #> 4 1 4 FALSE #> 5 4 1 FALSE #> 6 1 5 TRUE #> # … with 7 more rows #> # #> # Node Data: 10 x 0