NlpTools\Clustering\Hierarchical

class Hierarchical extends Clusterer

This class implements hierarchical agglomerative clustering.

It receives a MergeStrategy as a parameter and a Distance metric.

Methods

array	cluster(TrainingSet $documents, FeatureFactoryInterface $ff) Group the documents together
	__construct(MergeStrategyInterface $ms, DistanceInterface $d)
static array	dendrogramToClusters(array $tree, integer $NC) Flatten a dendrogram to an almost specific number of clusters (the closest power of 2 larger than $NC)

Group the documents together

TrainingSet	$documents	The documents to be clustered
FeatureFactoryInterface	$ff	A feature factory to transform the documents given

array

An array containing one element which is the resulting dendrogram

MergeStrategyInterface	$ms
DistanceInterface	$d

Flatten a dendrogram to an almost specific number of clusters (the closest power of 2 larger than $NC)

array	$tree	The dendrogram to be flattened
integer	$NC	The number of clusters to cut to

array

The flat clusters