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PHP Class Phpml\Association\Apriori

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Public Methods

Method	Description
__construct ( float $support, float $confidence )	Apriori constructor.
apriori ( ) : array	Generates frequent item sets.
getRules ( ) : array	Get all association rules which are generated for every k-length frequent item set.

Protected Methods

Method	Description
predictSample ( array $sample ) : array

Private Methods

Method	Description
antecedents ( array $sample ) : array	Generates all proper subsets for given set $sample without the empty set.
candidates ( array $samples ) : array	Calculates frequent k item sets, where count($samples) == $k - 1.
confidence ( array $set, array $subset ) : float	Calculates confidence for $set. Confidence is the relative amount of sets containing $subset which also contain $set.
contains ( array $system, array $set ) : boolean	Returns true if set is an element of system.
equals ( array $set1, array $set2 ) : boolean	Returns true if string representation of items does not differ.
frequency ( array $sample ) : integer	Counts occurrences of $sample as subset in data pool.
frequent ( array $samples ) : array	Returns frequent item sets only.
generateAllRules ( )	Generate rules for each k-length frequent item set.
generateRules ( array $frequent )	Generate confident rules for frequent item set.
items ( ) : array	Calculates frequent k = 1 item sets.
powerSet ( array $sample ) : array	Generates the power set for given item set $sample.
subset ( array $set, array $subset ) : boolean	Returns true if subset is a (proper) subset of set by its items string representation.
support ( array $sample ) : float	Calculates support for item set $sample. Support is the relative amount of sets containing $sample in the data pool.

Method Details