PHP __ll_distance_to_centroid Exemples

Exemple #1

Fichier : kmeans.php Projet : vinamilvinamil/Learning-Library-for-PHP

function _ll_closest_centroid($x, $centroids)
{
    $smallest = null;
    $smallest_distance = PHP_INT_MAX;
    foreach ($centroids as $index => $centroid) {
        $distance = __ll_distance_to_centroid($x, $centroid);
        if ($distance < $smallest_distance) {
            $smallest = $index;
            $smallest_distance = $distance;
        }
    }
    return $smallest;
}

Exemple #2

Fichier : kmeans_test.php Projet : vinamilvinamil/Learning-Library-for-PHP

 public function testDistanceToCentroid()
 {
     $result = __ll_distance_to_centroid(array(1, 1, 1, 1), array(3, 3, 3, 3));
     $this->assertEquals(4, $result);
     $result = __ll_distance_to_centroid(array(1, 1, 1, 1), array(3, 1, 3, 3));
     $this->assertEquals(3.46, round($result, 2));
     $result = __ll_distance_to_centroid(array(1, 2), array(2, 1));
     $this->assertEquals(sqrt(2), $result);
     $result = __ll_distance_to_centroid(array(0, 0), array(0, 0));
     $this->assertEquals(0, $result);
     $result = __ll_distance_to_centroid(array(5.3, 5.3), array(5.3, 5.3));
     $this->assertEquals(0, $result);
     $result = __ll_distance_to_centroid(array(1000), array(20));
     $this->assertEquals(980, $result);
 }