## add_double(series_name, x_values, y_values) {#str_floatlist_floatlist} Adds new [ChartSeries](../../chartseries/) to this collection. Use this method to add series to any type of Scatter charts....... ```python doc = aw.Document() builder = aw.DocumentBuilder(doc=doc)...ExCharts._append_chart(builder, aw.drawing.charts.ChartType.COLUMN...