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lib/AI/CBR/Case.pm  view on Meta::CPAN

The hash keys identify the attributes of the case,
the hash reference specifies this attribute,
with the following values:

=over 4

=item * B<sim>: a reference to the similarity function to use for this attribute

=item * B<param>: the parameter for the similarity function, if required

=item * B<weight>: the weight of the attribute in the comparison of the case. If you do not give a weight value for an attribute, the package's C<$DEFAULT_WEIGHT> will be used, which is 1 by default.

=item * B<value>: the value of the attribute, if you want to specify the complete case immediately. You can also do this later.

=back

=cut

sub new {
	my ($class, %attributes) = @_;
	
	# set default weights if unspecified
	foreach (keys %attributes) {
		$attributes{$_}->{weight} = $DEFAULT_WEIGHT unless defined $attributes{$_}->{weight};
	}
	
	my $self = \%attributes;
	bless $self, $class;
	return $self;
}

lib/AI/CBR/Case/Compound.pm  view on Meta::CPAN

Creates a new compound case specification.
Pass a list of hash references as argument.
Each hash reference is the same specification as passed to L<AI::CBR::Case>.

=cut

sub new {
	my ($class, @definitions) = @_;
	
	# set default weights if unspecified
	foreach my $attributes (@definitions) {
		foreach (keys %$attributes) {
			$attributes->{$_}->{weight} = $DEFAULT_WEIGHT unless defined $attributes->{$_}->{weight};
		}
	}
	
	my $self = \@definitions;
	bless $self, $class;
	return $self;
}

t/02-case.t  view on Meta::CPAN

my $case1 = AI::CBR::Case->new(
	age      => { value => 30,             sim => \&sim_amount },
	gender   => { value => 'male',         sim => \&sim_eq     },
	job      => { value => 'programmer',   sim => \&sim_eq     },
	symptoms => { value => [qw(headache)], sim => \&sim_set,   weight =>2 },
);

my $weights_at_1 = int grep { $case1->{$_}->{weight} == 1 } keys %$case1;
my $weights_at_2 = int grep { $case1->{$_}->{weight} == 2 } keys %$case1;
is($weights_at_1, 3, 'default weights set to 1');
is($weights_at_2, 1, 'symptom weight set to 2');