public function dbscanDataAction()
{
$db = $this->container->getDBUtils();
$jobid = Utils::get_GET_string("jobid");
$metric_x = Utils::get_GET_int("metric_x") !== null ? Utils::get_GET_int("metric_x") : 0;
$metric_y = Utils::get_GET_int("metric_y") !== null ? Utils::get_GET_int("metric_y") : 1;
$task_type = $db->get_task_type(Utils::get_GET_string("task_type"));
$heuristic = Utils::get_GET_int("heuristic") !== null ? Utils::get_GET_int("heuristic") : 1;
$eps = Utils::get_GET_float("eps") !== null ? Utils::get_GET_float("eps") : 250000;
$minPoints = Utils::get_GET_int("minPoints") !== null ? Utils::get_GET_int("minPoints") : 1;
// Heuristic: let DBSCAN choose the parameters
if ($heuristic) {
$eps = $minPoints = null;
}
$dbscan = $db->get_dbscan($jobid, $metric_x, $metric_y, $task_type, $eps, $minPoints);
$seriesData = array();
foreach ($dbscan->getClusters() as $cluster) {
$data = array();
foreach ($cluster as $point) {
$task_id = $point->info['task_id'];
$task_value_x = $point->x;
$task_value_y = $point->y;
$data[] = array('x' => $task_value_x, 'y' => $task_value_y, 'task_id' => $task_id);
}
if ($data) {
$seriesData[] = array('points' => $data, 'size' => $cluster->count(), 'x_min' => $cluster->getXMin(), 'x_max' => $cluster->getXMax(), 'y_min' => $cluster->getYMin(), 'y_max' => $cluster->getYMax());
}
}
$noiseData = array();
foreach ($dbscan->getNoise() as $point) {
$task_id = $point->info['task_id'];
$task_value_x = $point->x;
$task_value_y = $point->y;
$noiseData[] = array('x' => $task_value_x, 'y' => $task_value_y, 'task_id' => $task_id);
}
$result = ['seriesData' => $seriesData, 'noiseData' => $noiseData, 'heuristic' => $heuristic, 'eps' => $dbscan->getEps(), 'minPoints' => $dbscan->getMinPoints()];
header('Content-Type: application/json');
ob_start('ob_gzhandler');
echo json_encode($result, JSON_NUMERIC_CHECK);
}
