public function getTargets() : array;
/** * @param Dataset $dataset * * @return Dataset[]|array */ private function splitByTarget(Dataset $dataset) : array { $targets = $dataset->getTargets(); $samples = $dataset->getSamples(); $uniqueTargets = array_unique($targets); $split = array_combine($uniqueTargets, array_fill(0, count($uniqueTargets), [])); foreach ($samples as $key => $sample) { $split[$targets[$key]][] = $sample; } $datasets = $this->createDatasets($uniqueTargets, $split); return $datasets; }