NAME
    Algorithm::MCL - perl module implementing Markov Cluster Algorithm using
    PDL

VERSION
    version 0.004

SYNOPSIS
        use Algorithm::MCL;
    
        my $obj1 = new MyClass;
        my $ref2 = {};
        my $ref3 = \"abc";
        my $ref4 = \$val1;
        my $ref5 = [];
    
        my $mcl1 = Algorithm::MCL->new();
    
        # create graph by adding edges
        $mcl1->addEdge($obj1, $ref2);
        $mcl1->addEdge($obj1, $ref3);
        $mcl1->addEdge($ref2, $ref3);
        $mcl1->addEdge($ref3, $ref4);
        $mcl1->addEdge($ref4, $ref5);

        # run MCL algorithm on created graph
        my $clusters1 = $mcl1->run();
    
        # get clusters
        foreach my $cluster ( @$clusters1 ) {
           print "Cluster size: ". scalar @$cluster. "\n";
        }
    
    
        ####################################
    
        my $val1 = \"aaa";
        my $val2 = \"bbb";
        my $val3 = \"ccc";
        my $val4 = \"ddd";
        my $val5 = \"eee";
    
        my $mcl2 = Algorithm::MCL->new();
        $mcl2->addEdge($val1, $val2);
        $mcl2->addEdge($val1, $val3);
        $mcl2->addEdge($val2, $val3);
        $mcl2->addEdge($val3, $val4);
        $mcl2->addEdge($val4, $val5);
    
        my $clusters2 = $mcl2->run();
    
        foreach my $cluster ( @$clusters2 ) {
            print "Found Cluster\n";
            foreach my $vertex ( @$cluster ) {
                print "  Cluster element: $$vertex \n";
            }
        }

DESCRIPTION
    This module is perl implementation of Markov Cluster Algorithm (MCL)
    based on Perl Data Language (PDL).

    MCL is algorithm of finding clusters of vertices in graph. More
    information about MCL can be found at <http://micans.org/mcl/>. There is
    also perl script implementing MCL - minimcl
    <http://www.micans.org/mcl/scripts/minimcl>.

    This module try to solve two problems:

    * easy integration MCL in perl scripts and modules. Algorithm::MCL
      accept references as input and every reference will be found later in
      some cluster.

    * performance and scale. Algorithm::MCL use Perl Data Language for most
      of its processing and should run very fast on very big clusters. Main
      Algorithm::MCL procedures are written with "pdlpp".

METHODS
  new()
    create new Algorithm::MCL object that accumulate graph edges and process
    data.

  addEdge($ref1, $ref2, $distance)
    add new edge to graph. first two parameters are reference to vertex
    objects. third parameter is "connection strength measurement" between
    vetices. "connection strength measurement" should be number between 0
    and 1, higher number means stronger connectivity. if "connection
    strength measurement" is not defined it set to 1.

  run()
    apply MCL algorithm on graph. return reference to array that every
    element is reference to cluser array.

AUTHOR
    Pinkhas Nisanov <pinkhas@nisanov.com>

COPYRIGHT AND LICENSE
    This software is copyright (c) 2012 by Pinkhas Nisanov.

    This is free software; you can redistribute it and/or modify it under
    the same terms as the Perl 5 programming language system itself.