diff --git a/Classes/PHPExcel/Chart/DataSeriesValues.php b/Classes/PHPExcel/Chart/DataSeriesValues.php
index 90ef668..6ef5e10 100644
--- a/Classes/PHPExcel/Chart/DataSeriesValues.php
+++ b/Classes/PHPExcel/Chart/DataSeriesValues.php
@@ -273,14 +273,33 @@ class PHPExcel_Chart_DataSeriesValues
 		return $this;
 	}
 
+	private function _stripNulls($var) {
+		return $var !== NULL;
+	}
+
 	public function refresh(PHPExcel_Worksheet $worksheet) {
+		echo '$this->_dataSource:',PHP_EOL;
+		var_dump($this->_dataSource);
         if ($this->_dataSource !== NULL) {
+			echo '$this->_dataValues:',PHP_EOL;
+			var_dump($this->_dataValues);
+
         	$calcEngine = PHPExcel_Calculation::getInstance();
-			$this->_dataValues = PHPExcel_Calculation::_unwrapResult(
+			$newDataValues = PHPExcel_Calculation::_unwrapResult(
 			    $calcEngine->_calculateFormulaValue(
-			        $this->_dataSource
+			        '='.$this->_dataSource,
+			        NULL,
+			        $worksheet->getCell('A1')
 			    )
 			);
+
+			echo '$newDataValues:',PHP_EOL;
+			var_dump($newDataValues);
+			$this->_dataValues = PHPExcel_Calculation_Functions::flattenArray($newDataValues);
+			$this->_dataValues = array_values(array_shift($newDataValues));
+//			$this->_dataValues = array_filter($this->_dataValues,array($this,'_stripNulls'));
+			echo '$this->_dataValues:',PHP_EOL;
+			var_dump($this->_dataValues);
 		}
 	}
 
diff --git a/Classes/PHPExcel/Writer/Excel2007/Chart.php b/Classes/PHPExcel/Writer/Excel2007/Chart.php
index 4a29a59..2128582 100644
--- a/Classes/PHPExcel/Writer/Excel2007/Chart.php
+++ b/Classes/PHPExcel/Writer/Excel2007/Chart.php
@@ -975,17 +975,6 @@ class PHPExcel_Writer_Excel2007_Chart extends PHPExcel_Writer_Excel2007_WriterPa
 
 					$dataValues = $plotSeriesValues->getDataValues();
 					if (!empty($dataValues)) {
-//						if (!is_array($dataValues)) {
-//							echo 'NOT AN ARRAY: ';
-//							var_dump($dataValues);
-//							$dataValues = PHPExcel_Calculation_Functions::flattenArray(
-//								PHPExcel_Calculation::getInstance()
-//								    ->calculateFormula('='.$dataValues,
-//								    	NULL,
-//								    	$pSheet->getCell('A1')
-//								    )
-//							);
-//						}
 						if (is_array($dataValues)) {
 							foreach($dataValues as $plotSeriesKey => $plotSeriesValue) {
 								$objWriter->startElement('c:pt');
@@ -1031,17 +1020,6 @@ class PHPExcel_Writer_Excel2007_Chart extends PHPExcel_Writer_Excel2007_WriterPa
 
 				$dataValues = $plotSeriesValues->getDataValues();
 				if (!empty($dataValues)) {
-//					if (!is_array($dataValues)) {
-//						echo 'NOT AN ARRAY: ';
-//						var_dump($dataValues);
-//						$dataValues = PHPExcel_Calculation_Functions::flattenArray(
-//							PHPExcel_Calculation::getInstance()
-//							    ->calculateFormula('='.$dataValues,
-//							    	NULL,
-//							    	$pSheet->getCell('A1')
-//							    )
-//						);
-//					}
 					if (is_array($dataValues)) {
 						foreach($dataValues as $plotSeriesKey => $plotSeriesValue) {
 							$objWriter->startElement('c:pt');