R: Adjacency lists

as_adj_list {igraph} | R Documentation

## Adjacency lists

### Description

Create adjacency lists from a graph, either for adjacent edges or for neighboring vertices

### Usage

    as_adj_list(graph, mode = c("all", "out", "in", "total"))

    as_adj_edge_list(graph, mode = c("all", "out", "in", "total"))

### Arguments

`graph` | The input graph.
`mode` | Character scalar, it gives what kind of adjacent edges/vertices to include in the lists. ‘`out`’ is for outgoing edges/vertices, ‘`in`’ is for incoming edges/vertices, ‘`all`’ is for both. This argument is ignored for undirected graphs.

### Details

`as_adj_list` returns a list of numeric vectors, which include the ids of neighbor vertices (according to the `mode` argument) of all vertices.

`as_adj_edge_list` returns a list of numeric vectors, which include the ids of adjacent edgs (according to the `mode` argument) of all vertices.

### Value

A list of numeric vectors.

### Author(s)

Gabor Csardi csardi.gabor@gmail.com

### See Also

`as_edgelist`, `as_adj`

### Examples

    g <- make_ring(10)
    as_adj_list(g)
    as_adj_edge_list(g)

[Package igraph version 1.2.6 Index]