axisY.setProperty(StyleTextPropertiesElement.FontSize, "10pt");
axisY.setProperty(StyleTextPropertiesElement.FontSizeAsian, "10pt");
axisY.setProperty(StyleTextPropertiesElement.FontCharsetComplex, "10pt");
// chart:grid
ChartGridElement grid = axisY.newChartGridElement();
grid.setProperty(StyleGraphicPropertiesElement.StrokeColor, "#b3b3b3");
grid.setChartClassAttribute(ChartClassAttribute.Value.MAJOR.toString());
// chart:series
int numSeries = dataSet.getDataSeriesCount();
Object[] valueCellRange = getValueCellRange();
Object[] labelCellRange = getLabelCellRange();