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

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


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 the AI::Categorizer manpage 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

Copyright 2000-2003 Ken Williams. All rights reserved.

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


SEE ALSO

AI::Categorizer(3)

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