R igraph manual pages

Create a graph from an edge list matrix

Description

graph_from_edgelist creates a graph from an edge list. Its argument is a two-column matrix, each row defines one edge. If it is a numeric matrix then its elements are interpreted as vertex ids. If it is a character matrix then it is interpreted as symbolic vertex names and a vertex id will be assigned to each name, and also a name vertex attribute will be added.

Usage

graph_from_edgelist(el, directed = TRUE)

from_edgelist(...)

Arguments

el	The edge list, a two column matrix, character or numeric.
directed	Whether to create a directed graph.
...	Passed to graph_from_edgelist.

Value

An igraph graph.

See Also

Other determimistic constructors: graph_from_atlas, graph_from_literal, make_chordal_ring, make_empty_graph, make_full_citation_graph, make_full_graph, make_graph, make_lattice, make_ring, make_star, make_tree

Examples

el <- matrix( c("foo", "bar", "bar", "foobar"), nc = 2, byrow = TRUE)
graph_from_edgelist(el)

# Create a ring by hand
graph_from_edgelist(cbind(1:10, c(2:10, 1)))

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