NAME

Bag::Similarity - Similarity measures for bags

SYNOPSIS

  use Bag::Similarity;

Bag::Similarity is the base class for similarity measures of bags.

All methods can be used as class or object methods.

  $object = Bag::Similarity->new();

  my $similarity = $object->similarity($any1,$any1,$width);

$any can be an arrayref, a hashref or a string. Strings are tokenized into n-grams of width $width.

$width must be integer, or defaults to 1.

  my $similarity = $object->from_tokens(['a','b'],['b']);

  my $similarity = $object->from_bags(['a'],['b']);

Croaks if called directly. This method should be implemented in a child module.

  my $intersection_size = $object->intersection(['a'],['b']);

  my $set_size_sum = $object->combined_length(['a'],['b']);

  my $min_set_size = $object->min(['a'],['b']);

  my @monograms = $object->ngrams('abc');
  my @bigrams = $object->ngrams('abc',2);

  my $arrayref = $object->_any($any,$width);

Helmut Wollmersdorfer <helmut@wollmersdorfer.at>

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

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