View source: R/combine_graphs.R

combine_graphs | R Documentation |

Combine two graphs in order to make a new graph.

```
combine_graphs(x, y)
```

`x` |
A |

`y` |
A |

A graph object of class `dgr_graph`

.

```
# Create a graph with a cycle
# containing 6 nodes
graph_cycle <-
create_graph() %>%
add_cycle(n = 6)
# Create a random graph with
# 8 nodes and 15 edges using the
# `add_gnm_graph()` function
graph_random <-
create_graph() %>%
add_gnm_graph(
n = 8,
m = 15,
set_seed = 23)
# Combine the two graphs in a
# union operation
combined_graph <-
combine_graphs(
graph_cycle,
graph_random)
# Get the number of nodes in
# the combined graph
combined_graph %>% count_nodes()
# The `combine_graphs()`
# function will renumber
# node ID values in graph `y`
# during the union; this ensures
# that node ID values are unique
combined_graph %>% get_node_ids()
```

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