DiagrammeR (version 0.8.2)

create_subgraph_from_selection: 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

graph

a graph object of class dgr_graph that is created using create_graph.

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)