Piwik\Plugins\CoreHome\Columns\Metrics\AverageTimeOnSite::compute PHP Метод

    public function compute(Row $row)
    {
        $sumVisitLength = $this->getMetric($row, 'sum_visit_length');
        $nbVisits = $this->getMetric($row, 'nb_visits');
        return Piwik::getQuotientSafe($sumVisitLength, $nbVisits, $precision = 0);
    }