select_last_edge {DiagrammeR} | R Documentation |
Select the last edge from a graph
object of class dgr_graph
. Strictly, this is
the edge definition that encompasses the last record
of the graph's edge data frame. In practice, this
will typically be the last edge created.
select_last_edge(graph)
graph |
a graph object of class
|
a graph object of class dgr_graph
.
library(magrittr) # Create an empty graph graph <- create_graph() # Add three nodes to the graph graph %<>% add_n_nodes(3) # Add two edges to the graph graph %<>% add_edge(1, 2) %>% add_edge(2, 3) # Select the last edge added graph %<>% select_last_edge # Get the current selection graph %>% get_selection #> $edges #> $edges$from #> [1] "2" #> #> $edges$to #> [1] "3"