NAME

Graph::Writer::Dot - write out directed graph in Dot format

SYNOPSIS

use Graph;
use Graph::Writer::Dot;

$graph = Graph->new();
# add edges and nodes to the graph

$writer = Graph::Writer::Dot->new();
$writer->write_graph($graph, 'mygraph.dot');

DESCRIPTION

Graph::Writer::Dot is a class for writing out a directed graph in the file format used by the dot tool (part of the AT+T graphviz package). The graph must be an instance of the Graph class, which is actually a set of classes developed by Jarkko Hietaniemi.

METHODS

new()

Constructor - generate a new writer instance.

$writer = Graph::Writer::Dot->new();

This can take one optional argument that tell to cluster nodes in subgraphs by using the attribute passed as value. See:

$writer = Graph::Writer::Dot->new(cluster => 'group');

It will group nodes that have the the same value in the 'group' attribute.

write_graph()

Write a specific graph to a named file:

$writer->write_graph($graph, $file);

The $file argument can either be a filename, or a filehandle for a previously opened file.

SEE ALSO

www.graphviz.org

The home page for the AT+T graphviz toolkit that includes the dot tool.

Graph

Jarkko Hietaniemi's modules for representing directed graphs, available from CPAN under modules/by-module/Graph/

Algorithms in Perl

The O'Reilly book which has a chapter on directed graphs, which is based around Jarkko's modules.

Graph::Writer

The base-class for Graph::Writer::Dot

REPOSITORY

https://github.com/neilb/Graph-ReadWrite

AUTHOR

Neil Bowers <neil@bowers.com>

COPYRIGHT

Copyright (c) 2001-2012, Neil Bowers. All rights reserved. Copyright (c) 2001, Canon Research Centre Europe. All rights reserved.

This script is free software; you can redistribute it and/or modify it under the same terms as Perl itself.