src/Maths/Algebra/Matrix.php
public function getY($index)
    {
        try {
            $ret = $this
                ->seekY($index)
                ->currentY();
        } catch (OutOfRangeException $e) {
            throw $e;
        }
        return $ret;
    }
public function getY($index)
    {
        try {
            $ret = $this
                ->seekY($index)
                ->currentY();
        } catch (OutOfRangeException $e) {
            throw $e;
        }
        return $ret;
    }
Get `y` value (column) by index

@param   string|int     $index
@return  array
@throws  OutOfRangeException if the index is out of range