NAME

HTML::WordTagRatio::WeightedRatio - Perl module for determining the ratio of words to tags in a range of tokens in an HTML document.

SYNOPSIS

  use HTML::WordTagRatio::WeightedRatio;
  use HTML::Content::HTMLTokenizer;
  use HTML::Content::ContentExtractor;

  my $tokenizer = new HTML::Content::HTMLTokenizer('TAG','WORD');

  open(HTML,"index.html");
  my $doc = join("",<HTML>);
  close(HTML);

  my ($word_count_arr_ref,$tag_count_arr_ref,$token_type_arr_ref,$token_hash_ref) = $tokenizer->Tokenize($doc);

  my $ratio = new HTML::WordTagRatio::WeightedRatio();

  my $value = $ratio->RangeValue(0, @$word_count_arr_ref, 
  				$word_count_arr_ref, $tag_count_arr_ref);

DESCRIPTION

HTML::WordTagRatio::WeightedRatio computes a ratio of Words to Tags for a given range. In psuedo code, the ratio is

Words^2/(Words + Tags)

Methods

* my $ratio = new HTML::WordTagRatio::WeightedRatio()

Initializes HTML::WordTagRatio::WeightedRatio

* my $value = $ratio->RangeValue($start, $end, \@WordCount, \@TagCount)

$value is computed as follows:

	($WordCount[$end] - $WordCount[$start])**2/(($WordCount[$end] - $WordCount[$start]) + ($TagCount[$end] - $TagCount[$start]))

This is the number of words in the range squared, divided by the total number of tags in range. $WordCount[$i] is the number of word tokens before or at the ith token in the input HTML document. $TagCount[$i] is the number of tag tokens before or at the ith token in the input HTML document.

AUTHOR

Jean Tavernier (jj.tavernier@gmail.com)

COPYRIGHT

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