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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 ArrayAccess; |
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class Point implements ArrayAccess |
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{ |
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/** |
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* @var int |
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*/ |
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protected $dimension; |
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/** |
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* @var array |
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*/ |
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protected $coordinates = []; |
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public function __construct(array $coordinates) |
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{ |
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$this->dimension = count($coordinates); |
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$this->coordinates = $coordinates; |
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} |
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public function toArray(): array |
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{ |
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return $this->coordinates; |
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} |
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/** |
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* @return int|mixed |
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*/ |
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public function getDistanceWith(self $point, bool $precise = true) |
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{ |
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$distance = 0; |
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for ($n = 0; $n < $this->dimension; ++$n) { |
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$difference = $this->coordinates[$n] - $point->coordinates[$n]; |
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$distance += $difference * $difference; |
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} |
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return $precise ? sqrt((float) $distance) : $distance; |
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} |
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/** |
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* @return mixed |
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*/ |
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public function getClosest(array $points) |
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{ |
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$minPoint = null; |
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foreach ($points as $point) { |
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$distance = $this->getDistanceWith($point, false); |
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if (!isset($minDistance)) { |
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$minDistance = $distance; |
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$minPoint = $point; |
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continue; |
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} |
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if ($distance < $minDistance) { |
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$minDistance = $distance; |
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$minPoint = $point; |
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} |
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} |
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return $minPoint; |
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} |
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public function getCoordinates(): array |
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{ |
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return $this->coordinates; |
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} |
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/** |
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* @param mixed $offset |
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*/ |
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public function offsetExists($offset): bool |
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{ |
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return isset($this->coordinates[$offset]); |
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} |
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/** |
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* @param mixed $offset |
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* |
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* @return mixed |
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*/ |
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public function offsetGet($offset) |
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{ |
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return $this->coordinates[$offset]; |
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} |
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/** |
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* @param mixed $offset |
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* @param mixed $value |
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*/ |
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public function offsetSet($offset, $value): void |
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{ |
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$this->coordinates[$offset] = $value; |
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} |
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/** |
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* @param mixed $offset |
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*/ |
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public function offsetUnset($offset): void |
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{ |
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unset($this->coordinates[$offset]); |
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} |
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} |
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php-ai /
php-ml
