Convert a vertex or edge sequence to an ordinary vector

Convert a vertex or edge sequence to an ordinary vector

Usage

as_ids(seq)

# S3 method for class 'igraph.vs'
as_ids(seq)

# S3 method for class 'igraph.es'
as_ids(seq)

Arguments

seq

The vertex or edge sequence.

Value

A character or numeric vector, see details below.

Details

For graphs without names, a numeric vector is returned, containing the internal numeric vertex or edge ids.

For graphs with names, and vertex sequences, the vertex names are returned in a character vector.

For graphs with names and edge sequences, a character vector is returned, with the ‘bar’ notation: a|b means an edge from vertex a to vertex b.

See also

Other vertex and edge sequences: E(), V(), igraph-es-attributes, igraph-es-indexing, igraph-es-indexing2, igraph-vs-attributes, igraph-vs-indexing, igraph-vs-indexing2, print.igraph.es(), print.igraph.vs()

Examples

g <- make_ring(10)
as_ids(V(g))
#>  [1]  1  2  3  4  5  6  7  8  9 10
as_ids(E(g))
#>  [1]  1  2  3  4  5  6  7  8  9 10

V(g)$name <- letters[1:10]
as_ids(V(g))
#>  [1] "a" "b" "c" "d" "e" "f" "g" "h" "i" "j"
as_ids(E(g))
#>  [1] "a|b" "b|c" "c|d" "d|e" "e|f" "f|g" "g|h" "h|i" "i|j" "a|j"