# make_line_graph

0th

Percentile

##### Line graph of a graph

This function calculates the line graph of another graph.

Keywords
graphs
##### Usage
make_line_graph(graph)line_graph(...)
##### Arguments
graph

The input graph, it can be directed or undirected.

...

Passed to make_line_graph.

##### Details

The line graph L(G) of a G undirected graph is defined as follows. L(G) has one vertex for each edge in G and two vertices in L(G) are connected by an edge if their corresponding edges share an end point.

The line graph L(G) of a G directed graph is slightly different, L(G) has one vertex for each edge in G and two vertices in L(G) are connected by a directed edge if the target of the first vertex's corresponding edge is the same as the source of the second vertex's corresponding edge.

##### Value

A new graph object.

##### Aliases
• make_line_graph
• line.graph
• line_graph
##### Examples
# NOT RUN {
# generate the first De-Bruijn graphs
g <- make_full_graph(2, directed=TRUE, loops=TRUE)
make_line_graph(g)
make_line_graph(make_line_graph(g))
make_line_graph(make_line_graph(make_line_graph(g)))

# }

Documentation reproduced from package igraph, version 1.2.4.1, License: GPL (>= 2)

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