# is_directed

From igraph v1.2.2
by Gabor Csardi

##### Check whether a graph is directed

Check whether a graph is directed

##### Usage

`is_directed(graph)`

##### Arguments

- graph
The input graph

##### Value

Logical scalar, whether the graph is directed.

##### See Also

Other structural queries: `[.igraph`

,
`[[.igraph`

, `adjacent_vertices`

,
`are_adjacent`

, `ends`

,
`get.edge.ids`

, `gorder`

,
`gsize`

, `head_of`

,
`incident_edges`

, `incident`

,
`neighbors`

, `tail_of`

##### Examples

```
# NOT RUN {
g <- make_ring(10)
is_directed(g)
g2 <- make_ring(10, directed = TRUE)
is_directed(g2)
# }
```

*Documentation reproduced from package igraph, version 1.2.2, License: GPL (>= 2)*

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