R: Check whether a graph is directed

is_directed {igraph} | R Documentation

## Check whether a graph is directed

### Description

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

    g <- make_ring(10)
    is_directed(g)

    g2 <- make_ring(10, directed = TRUE)
    is_directed(g2)

[Package igraph version 1.3.2 Index]