public function transpose()
	{
		$array	= array();
		$rowNumber		= $this->getRowNumber();
		$columnNumber	= $this->getColumnNumber();
		for( $row = 0; $row < $rowNumber; $row++ )
			for( $column = 0; $column < $columnNumber; $column++ )
				$array[$column][$row]	= $this->values[$row][$column];
		$this->rowNumber	= $columnNumber;
		$this->columnNumber	= $rowNumber;
		$this->values		= $array;
	}