NAME

Set::Similarity::BV::Dice - Dice coefficent for sets

SYNOPSIS

use Set::Similarity::BV::Dice;

my $dice = Set::Similarity::BV::Dice->new;
my $similarity = $dice->similarity('af09ff','9c09cc');

DESCRIPTION

Dice coefficient

The Dice coefficient is the number of elements in common to both sets relative to the average size of the total number of elements present, i.e.

( A intersect B ) / 0.5 ( A + B ) # the same as sorensen

The weighting factor comes from the 0.5 in the denominator. The range is 0 to 1.

METHODS

Set::Similarity::BV::Dice inherits all methods from Set::Similarity::BV and implements the following new ones.

from_integers

my $similarity = $object->from_integers($AoI1,$AoI2);

This method expects two array references of integers as parameters. The parameters are not checked, thus can lead to funny results or uncatched divisions by zero.

If you want to use this method directly, you should catch the situation where one of the parameters is empty (similarity is 0), or both are empty (similarity is 1).

SOURCE REPOSITORY

http://github.com/wollmers/Set-Similarity-BV-BV

AUTHOR

Helmut Wollmersdorfer, <helmut.wollmersdorfer@gmail.com>

COPYRIGHT AND LICENSE

Copyright (C) 2016 by Helmut Wollmersdorfer

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