# make_chordal_ring

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##### Create an extended chordal ring graph

make_chordal_ring creates an extended chordal ring. An extended chordal ring is regular graph, each node has the same degree. It can be obtained from a simple ring by adding some extra edges specified by a matrix. Let p denote the number of columns in the ‘W’ matrix. The extra edges of vertex i are added according to column i mod p in ‘W’. The number of extra edges is the number of rows in ‘W’: for each row j an edge i->i+w[ij] is added if i+w[ij] is less than the number of total nodes. See also Kotsis, G: Interconnection Topologies for Parallel Processing Systems, PARS Mitteilungen 11, 1-6, 1993.

##### Usage
make_chordal_ring(n, w)chordal_ring(...)
##### Arguments
n

The number of vertices.

w

A matrix which specifies the extended chordal ring. See details below.

...

Passed to make_chordal_ring.

##### Value

An igraph graph.

Other determimistic constructors: graph_from_atlas(), graph_from_edgelist(), graph_from_literal(), make_empty_graph(), make_full_citation_graph(), make_full_graph(), make_graph(), make_lattice(), make_ring(), make_star(), make_tree()

##### Aliases
• make_chordal_ring
• graph.extended.chordal.ring
• chordal_ring
##### Examples
# NOT RUN {
chord <- make_chordal_ring(15,
matrix(c(3, 12, 4, 7, 8, 11), nr = 2))
# }

Documentation reproduced from package igraph, version 1.2.5, License: GPL (>= 2)

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