private function analyzeRoutine(Routine $routine, PerformanceStatistic $statistic, $target)
{
$sum = 0;
$min = 30;
$max = 0;
$scores = $routine->getPerformanceScores()->count();
$values = [];
foreach ($routine->getPerformanceScores() as $score) {
$method = 'get' . $target;
$val = $score->{$method}();
$min = min($min, $val);
$max = max($max, $val);
$sum += $val;
$values[] = $val;
}
$avg = $sum / $scores;
$statistic->setAverage($avg);
$statistic->setMin($min);
$statistic->setMax($max);
$statistic->setRange(abs($max - $min));
// median
sort($values);
if ($scores % 2 == 0) {
$lower = floor($scores / 2);
$upper = ceil($scores / 2);
$md = ($values[$lower] + $values[$upper]) / 2;
} else {
$md = $values[ceil($scores / 2)];
}
$statistic->setMedian($md);
// sd + variance
$sum = 0;
foreach ($routine->getPerformanceScores() as $score) {
$method = 'get' . $target;
$sum += pow($val - $avg, 2);
}
$v = 1 / ($scores - 1) * $sum;
$sd = sqrt($v);
$statistic->setVariance($v);
$statistic->setStandardDeviation($sd);
$statistic->setVariabilityCoefficient($sd / $avg * 100);
$statistic->save();
return $statistic;
}
