select_rev_edges_ws {DiagrammeR} | R Documentation |
From an active selection of edges in
a graph object of class dgr_graph
, select any
of the available reverse edges between the nodes
common to the selected edges. For instance, if an
active selection has the edge 1- 2
but
there is also an (unselected) edge 2->1
,
then this function can either switch to the selection
of 2->1
, or, incorporate those edges in the
active selection of edges.
select_rev_edges_ws(graph, add_to_selection = TRUE)
graph |
a graph object of class
|
add_to_selection |
an option to either add the
reverse edges to the active selection of edges (the
default case, as |
a graph object of class dgr_graph
.
# Create a node data frame (ndf) ndf <- create_node_df( n = 4, type = "basic", label = TRUE) # Create an edge data frame (edf) edf <- create_edge_df( from = c(1, 4, 2, 3, 3), to = c(4, 1, 3, 2, 1)) # Create a graph with the ndf and edf graph <- create_graph( nodes_df = ndf, edges_df = edf) # Explicitly select the edges `1`->`4` # and `2`->`3` graph <- graph %>% select_edges(from = 1, to = 4) %>% select_edges(from = 2, to = 3) # Add to the selection the reverse edge # (`4`->`1`) graph <- graph %>% select_rev_edges_ws() # Get the current selection of edges get_selection(graph) #> [1] 1 2 3 4