complementer | R Documentation |

A complementer graph contains all edges that were not present in the input graph.

```
complementer(graph, loops = FALSE)
```

`graph` |
The input graph, can be directed or undirected. |

`loops` |
Logical constant, whether to generate loop edges. |

`complementer()`

creates the complementer of a graph. Only edges
which are *not* present in the original graph will be included in the
new graph.

`complementer()`

keeps graph and vertex attriubutes, edge
attributes are lost.

A new graph object.

Gabor Csardi csardi.gabor@gmail.com

Other functions for manipulating graph structure:
`+.igraph()`

,
`add_edges()`

,
`add_vertices()`

,
`compose()`

,
`connect()`

,
`contract()`

,
`delete_edges()`

,
`delete_vertices()`

,
`difference.igraph()`

,
`difference()`

,
`disjoint_union()`

,
`edge()`

,
`igraph-minus`

,
`intersection.igraph()`

,
`intersection()`

,
`path()`

,
`permute()`

,
`rep.igraph()`

,
`reverse_edges()`

,
`simplify()`

,
`union.igraph()`

,
`union()`

,
`vertex()`

```
## Complementer of a ring
g <- make_ring(10)
complementer(g)
## A graph and its complementer give together the full graph
g <- make_ring(10)
gc <- complementer(g)
gu <- union(g, gc)
gu
graph.isomorphic(gu, make_full_graph(vcount(g)))
```

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