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<?php |
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declare(strict_types=1); |
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namespace Phpml\Clustering\KMeans; |
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use Countable; |
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use IteratorAggregate; |
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use LogicException; |
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use SplObjectStorage; |
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class Cluster extends Point implements IteratorAggregate, Countable |
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{ |
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/** |
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* @var Space |
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*/ |
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protected $space; |
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/** |
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* @var SplObjectStorage|Point[] |
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*/ |
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protected $points; |
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public function __construct(Space $space, array $coordinates) |
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{ |
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parent::__construct($coordinates); |
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$this->space = $space; |
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$this->points = new SplObjectStorage(); |
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} |
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public function getPoints(): array |
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{ |
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$points = []; |
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foreach ($this->points as $point) { |
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$points[] = $point->toArray(); |
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} |
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return $points; |
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} |
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public function getPointsWithLabels(): array |
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{ |
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$points = []; |
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foreach ($this->points as $point) { |
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$points[$point->label] = $point->toArray(); |
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} |
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return $points; |
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} |
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public function toArray(): array |
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{ |
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return [ |
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'centroid' => parent::toArray(), |
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'points' => $this->getPoints(), |
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]; |
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} |
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public function attach(Point $point): Point |
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{ |
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if ($point instanceof self) { |
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throw new LogicException('Cannot attach a cluster to another'); |
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} |
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$this->points->attach($point); |
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return $point; |
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} |
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public function detach(Point $point): Point |
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{ |
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$this->points->detach($point); |
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return $point; |
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} |
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public function attachAll(SplObjectStorage $points): void |
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{ |
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$this->points->addAll($points); |
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} |
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public function detachAll(SplObjectStorage $points): void |
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{ |
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$this->points->removeAll($points); |
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} |
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public function updateCentroid(): void |
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{ |
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$count = count($this->points); |
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if ($count === 0) { |
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return; |
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} |
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$centroid = $this->space->newPoint(array_fill(0, $this->dimension, 0)); |
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foreach ($this->points as $point) { |
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View Code Duplication |
for ($n = 0; $n < $this->dimension; ++$n) { |
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$centroid->coordinates[$n] += $point->coordinates[$n]; |
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} |
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} |
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View Code Duplication |
for ($n = 0; $n < $this->dimension; ++$n) { |
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$this->coordinates[$n] = $centroid->coordinates[$n] / $count; |
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} |
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} |
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/** |
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* @return Point[]|SplObjectStorage |
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*/ |
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public function getIterator() |
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{ |
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return $this->points; |
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} |
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/** |
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* @return mixed |
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*/ |
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public function count() |
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{ |
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return count($this->points); |
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} |
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public function setCoordinates(array $newCoordinates): void |
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{ |
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$this->coordinates = $newCoordinates; |
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} |
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} |
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php-ai /
php-ml
Loading history...
Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation.
You can also find more detailed suggestions in the “Code” section of your repository.