PHPOffice / PhpSpreadsheet

                    $objWriter->writeAttribute('val', 100);

                    $objWriter->endElement();

                }

            } elseif ($chartType === DataSeries::TYPE_BUBBLECHART) {

                $objWriter->startElement('c:bubbleScale');

                $objWriter->writeAttribute('val', 25);

                $objWriter->endElement();

                $objWriter->startElement('c:showNegBubbles');

                $objWriter->writeAttribute('val', 0);

                $objWriter->endElement();

            } elseif ($chartType === DataSeries::TYPE_STOCKCHART) {

                $objWriter->startElement('c:hiLowLines');

                $objWriter->endElement();

                $objWriter->startElement('c:axId');

                $objWriter->writeAttribute('val', $id2);

                $objWriter->endElement();

            } else {

                $objWriter->startElement('c:firstSliceAng');

                $objWriter->writeAttribute('val', 0);

                $objWriter->endElement();

                if ($chartType === DataSeries::TYPE_DONUTCHART) {

                    $objWriter->startElement('c:holeSize');

                    $objWriter->writeAttribute('val', 50);

                    $objWriter->endElement();

                }

            }

            $objWriter->endElement();

        }