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hopefully fixed devision by 0

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This commit is contained in:
Dennis Eichhorn 2019-10-31 21:16:33 +01:00
parent 18c11fb229
commit f5494f4b31
1 changed files with 4 additions and 3 deletions
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7
Algorithm/Clustering/Kmeans.php
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@ -91,11 +91,11 @@ final class Kmeans
* *
* @param PointInterface $point Point to find the cluster for * @param PointInterface $point Point to find the cluster for
* *
* @return PointInterface * @return null|PointInterface
* *
* @since 1.0.0 * @since 1.0.0
*/ */
public function cluster(PointInterface $point) : PointInterface public function cluster(PointInterface $point) : ?PointInterface
{ {
$bestCluster = null; $bestCluster = null;
$bestDistance = \PHP_FLOAT_MAX; $bestDistance = \PHP_FLOAT_MAX;
@ -132,7 +132,7 @@ final class Kmeans
$center->setCoordinate($i, 0); $center->setCoordinate($i, 0);
} }
$center->setGroup(0); //$center->setGroup(0); done because of bug below?!
} }
foreach ($points as $point) { foreach ($points as $point) {
@ -149,6 +149,7 @@ final class Kmeans
foreach ($clusterCenters as $center) { foreach ($clusterCenters as $center) {
for ($i = 0; $i < $coordinates; ++$i) { for ($i = 0; $i < $coordinates; ++$i) {
// todo: here is a bug sometimes center->getGroup() is 0
$center->setCoordinate($i, $center->getCoordinate($i) / $center->getGroup()); $center->setCoordinate($i, $center->getCoordinate($i) / $center->getGroup());
} }
} }