src/Maths/Algebra/Matrix.php
public function seekToOffset($offset)
    {
        try {
            if (($this->getArrayFlag() & self::ARRAY_INT) && !is_string($offset)) {
                return $this->seekToOffsetInteger($offset);
            } else {
                return $this->seekToOffsetPositional($offset);
            }
        } catch (OutOfRangeException $e) {
            throw $e;
        }
    }
public function seekToOffset($offset)
    {
        try {
            if (($this->getArrayFlag() & self::ARRAY_INT) && !is_string($offset)) {
                return $this->seekToOffsetInteger($offset);
            } else {
                return $this->seekToOffsetPositional($offset);
            }
        } catch (OutOfRangeException $e) {
            throw $e;
        }
    }
Seek `x` and `y` to an offset

@param   int/string   $offset
@return  $this
@throws  OutOfRangeException if the offset is out of range of matrix's indexes