NAME

AI::Categorizer::Learner::Guesser - Simple guessing based on class probabilities

SYNOPSIS

  use AI::Categorizer::Learner::Guesser;
  
  # Here $k is an AI::Categorizer::KnowledgeSet object
  
  my $l = new AI::Categorizer::Learner::Guesser;
  $l->train(knowledge_set => $k);
  $l->save_state('filename');
  
  ... time passes ...
  
  $l = AI::Categorizer::Learner->restore_state('filename');
  my $c = new AI::Categorizer::Collection::Files( path => ... );
  while (my $document = $c->next) {
    my $hypothesis = $l->categorize($document);
    print "Best assigned category: ", $hypothesis->best_category, "\n";
    print "All assigned categories: ", join(', ', $hypothesis->categories), "\n";
  }

DESCRIPTION

This implements a simple category guesser that makes assignments based solely on the prior probabilities of categories. For instance, if 5% of the training documents belong to a certain category, then the probability of any test document being assigned to that category is 0.05. This can be useful for providing baseline scores to compare with other more sophisticated algorithms.

See AI::Categorizer for a complete description of the interface.

METHODS

This class inherits from the "AI::Categorizer::Learner" class, so all of its methods are available.

AUTHOR

Ken Williams ("<ken@mathforum.org>")

COPYRIGHT