Create a subgraph based on a selection of nodes or edges

Description

Create a subgraph based on a selection of nodes or edges extant in the graph object.

Usage

create_subgraph_from_selection(graph)

Arguments

Value

a graph object of class dgr_graph.

Examples

## Not run: 
# Create a simple graph
nodes <-
  create_nodes(nodes = c("a", "b", "c", "d",
                         "e", "f", "g", "h"),
               value = c(3.5, 2.6, 9.4, 2.7,
                         5.2, 2.1, 4.8, 8.5))

edges <-
  create_edges(from = c("a", "b", "c", "g", "e",
                        "e", "h", "f", "a", "c"),
               to = c("d", "c", "a", "c", "h",
                      "b", "d", "e", "f", "d"))

graph <-
  create_graph(nodes_df = nodes,
               edges_df = edges)

get_nodes(graph)
#> [1] "a" "b" "c" "d" "e" "f" "g" "h"

get_edges(graph, return_type = "vector")
#> [1] "a -> d" "b -> c" "c -> a" "g -> c" "e -> h"
#> [6] "e -> b" "h -> d" "f -> e" "a -> f" "c -> d"

# Create a selection of nodes, stored within the
# graph object
graph <-
  select_nodes(graph,
               node_attr = "value",
               search = "> 3")

# Create a subgraph based on the selection
subgraph <-
  create_subgraph_from_selection(graph)

get_nodes(subgraph)
#> [1] "a" "c" "e" "g" "h"

get_edges(subgraph, return_type = "vector")
#> [1] "c -> a" "g -> c" "e -> h"

## End(Not run)

Results