public function getPlotLabelByIndex($index) {
		$keys = array_keys($this->_plotLabel);
		if (in_array($index,$keys)) {
			return $this->_plotLabel[$index];
		} elseif(isset($keys[$index])) {
			return $this->_plotLabel[$keys[$index]];
		}
		return false;
	}
public function getPlotLabelByIndex($index) {
		$keys = array_keys($this->_plotLabel);
		if (in_array($index,$keys)) {
			return $this->_plotLabel[$index];
		} elseif(isset($keys[$index])) {
			return $this->_plotLabel[$keys[$index]];
		}
		return false;
	}
public function getPlotLabelByIndex ( $ index ) { $ keys = array_keys ( $ this -> _plotLabel ) ; if ( in_array ( $ index , $ keys ) ) { return $ this -> _plotLabel [ $ index ] ; } elseif ( isset ( $ keys [ $ index ] ) ) { return $ this -> _plotLabel [ $ keys [ $ index ] ] ; } return false ; }
Get Plot Label by Index

@return PHPExcel_Chart_DataSeriesValues
Get Plot Label by Index