Phpml\Metric\ClassificationReport::computeAverage PHP Method

    private function computeAverage()
    {
        foreach (['precision', 'recall', 'f1score'] as $metric) {
            $values = array_filter($this->{$metric});
            if (0 == count($values)) {
                $this->average[$metric] = 0.0;
                continue;
            }
            $this->average[$metric] = array_sum($values) / count($values);
        }
    }