src/Maths/Algebra/Matrix.php
public function currentY()
    {
        $col = array();
        foreach ($this->data as $x=>$items) {
            $col[$x] = (isset($items[$this->keyY(true)]) ? $items[$this->keyY(true)] : null);
        }
        return $col;
    }
public function currentY()
    {
        $col = array();
        foreach ($this->data as $x=>$items) {
            $col[$x] = (isset($items[$this->keyY(true)]) ? $items[$this->keyY(true)] : null);
        }
        return $col;
    }
Get current `y` value (column)

@return array|null