For something trainable, how about
Voting::Condorcet::RankedPairs?
#!/usr/bin/perl
use strict;
use warnings;
use Data::Dump::Streamer;
use Voting::Condorcet::RankedPairs;
my $rp = Voting::Condorcet::RankedPairs->new(
ordered_input => 1 );
$rp->add('clean', 'porn', 0.7);
$rp->add('null', 'undecided', 0.6);
my @winners = $rp->strict_winners;
my @results = $rp->strict_rankings;
my $graph = $rp->graph;
print $graph, "\n";
print Dump $graph, "\n";
Update: I got graphviz installed. This is more realtime:
#!/usr/bin/perl
use strict;
use warnings;
use GraphViz::Data::Grapher;
use Voting::Condorcet::RankedPairs;
my $rp = Voting::Condorcet::RankedPairs->new(
ordered_input => 1 );
$rp->add('clean', 'porn', 0.9);
$rp->add('null', 'undecided', 0.1);
my (@winners) = $rp->strict_winners;
my (@results) = $rp->strict_rankings;
my $graph = $rp->graph;
$rp->compile;
print $graph, "\n";
my $grapher = GraphViz::Data::Grapher->new(@winners);
print $grapher->as_svg, "\n";
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