From a graph object of class dgr_graph or an edge data frame, set edge
attribute properties for one or more edges.
This function makes use of an active selection of edges (and the function
ending with _ws hints at this).
Selections of edges can be performed using the following selection
(select_*()) functions: select_edges(), select_last_edges_created(),
select_edges_by_edge_id(), or select_edges_by_node_id().
Selections of edges can also be performed using the following traversal
(trav_*()) functions: trav_out_edge(), trav_in_edge(),
trav_both_edge(), or trav_reverse_edge().
Arguments
- graph
A graph object of class
dgr_graph.- edge_attr
The name of the attribute to set.
- value
The value to be set for the chosen attribute for the edges in the current selection.
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(),
delete_loop_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()
Examples
# Create a simple graph
graph <-
create_graph() %>%
add_path(n = 6)
# Select specific edges from
# the graph and apply the edge
# attribute `color = blue` to
# those selected edges
graph <-
graph %>%
select_nodes_by_id(nodes = 2:4) %>%
trav_out_edge() %>%
set_edge_attrs_ws(
edge_attr = color,
value = "blue")
# Show the internal edge data
# frame to verify that the
# edge attribute has been set
# for specific edges
graph %>% get_edge_df()
#> id from to rel color
#> 1 1 1 2 <NA> <NA>
#> 2 2 2 3 <NA> blue
#> 3 3 3 4 <NA> blue
#> 4 4 4 5 <NA> blue
#> 5 5 5 6 <NA> <NA>