View source: R/transform_to_subgraph_ws.R
transform_to_subgraph_ws | R Documentation |
Create a subgraph based on a selection of nodes or edges stored in the graph object.
This function makes use of an active selection of nodes or edges (and the
function ending with _ws
hints at this).
Selections of nodes can be performed using the following node selection
(select_*()
) functions: select_nodes()
, select_last_nodes_created()
,
select_nodes_by_degree()
, select_nodes_by_id()
, or
select_nodes_in_neighborhood()
.
Selections of edges can be performed using the following edge selection
(select_*()
) functions: select_edges()
, select_last_edges_created()
,
select_edges_by_edge_id()
, or select_edges_by_node_id()
.
Selections of nodes or edges can also be performed using the following
traversal (trav_*()
) functions: trav_out()
, trav_in()
, trav_both()
,
trav_out_node()
, trav_in_node()
, trav_out_until()
, trav_in_until()
,
trav_out_edge()
, trav_in_edge()
, trav_both_edge()
, or
trav_reverse_edge()
.
transform_to_subgraph_ws(graph)
graph |
A graph object of class |
A graph object of class dgr_graph
.
# Create a node data frame (ndf)
ndf <-
create_node_df(
n = 6,
value =
c(3.5, 2.6, 9.4,
2.7, 5.2, 2.1))
# Create an edge data frame (edf)
edf <-
create_edge_df(
from = c(1, 2, 4, 5, 2, 6, 2),
to = c(2, 4, 1, 3, 5, 5, 4))
# Create a graph
graph <-
create_graph(
nodes_df = ndf,
edges_df = edf)
# Create a selection of nodes, this selects
# nodes `1`, `3`, and `5`
graph <-
graph %>%
select_nodes(
conditions = value > 3)
# Create a subgraph based on the selection
subgraph <-
graph %>%
transform_to_subgraph_ws()
# Display the graph's node data frame
subgraph %>% get_node_df()
# Display the graph's edge data frame
subgraph %>% get_edge_df()
# Create a selection of edges, this selects
# edges `1`, `2`
graph <-
graph %>%
clear_selection() %>%
select_edges(
edges = c(1,2))
# Create a subgraph based on the selection
subgraph <-
graph %>%
transform_to_subgraph_ws()
# Display the graph's node data frame
subgraph %>% get_node_df()
# Display the graph's edge data frame
subgraph %>% get_edge_df()
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