File Coverage

blib/lib/Set/Similarity/Cosine.pm

Criterion	Covered	Total	%
statement	11	11	100.0
branch			n/a
condition			n/a
subroutine	4	4	100.0
pod	1	1	100.0
total	16	16	100.0

package Set::Similarity::Cosine;

use strict;
use warnings;

use parent 'Set::Similarity';

our $VERSION = '0.025';

sub from_sets {
  my ($self, $set1, $set2) = @_;

  # it is so simple because the vectors contain only 0 and 1
  return (
    $self->intersection($set1,$set2) / (sqrt(scalar @$set1) * sqrt(scalar @$set2))
  );
}

1;

__END__