Cómo crear un gráfico de cascada con Node.js vía C++
Las API de Aspose.Cells permiten crear un gráfico de cascada con la ayuda del gráfico de líneas. La API también permite personalizar la apariencia del gráfico para darle forma de cascada configurando las propiedades Series.getUpBars() y Series.getDownBars().
El fragmento de código proporcionado a continuación demuestra el uso de Aspose.Cells for Node.js via C++ para crear un gráfico de cascada desde cero.
const path = require("path");
const AsposeCells = require("aspose.cells.node");
// The path to the documents directory.
const dataDir = path.join(__dirname, "data");
const filePath = path.join(dataDir, "sample.xlsx");
// Create an instance of Workbook
const workbook = new AsposeCells.Workbook();
// Retrieve the first Worksheet in Workbook
const worksheet = workbook.getWorksheets().get(0);
// Retrieve the Cells of the first Worksheet
const cells = worksheet.getCells();
// Input some data which chart will use as source
cells.get("A1").putValue("Previous Year");
cells.get("A2").putValue("January");
cells.get("A3").putValue("March");
cells.get("A4").putValue("August");
cells.get("A5").putValue("October");
cells.get("A6").putValue("Current Year");
cells.get("B1").putValue(8.5);
cells.get("B2").putValue(1.5);
cells.get("B3").putValue(7.5);
cells.get("B4").putValue(7.5);
cells.get("B5").putValue(8.5);
cells.get("B6").putValue(3.5);
cells.get("C1").putValue(1.5);
cells.get("C2").putValue(4.5);
cells.get("C3").putValue(3.5);
cells.get("C4").putValue(9.5);
cells.get("C5").putValue(7.5);
cells.get("C6").putValue(9.5);
// Add a Chart of type Waterfall in same worksheet as of data
const idx = worksheet.getCharts().add(AsposeCells.ChartType.Waterfall, 4, 4, 25, 13);
// Retrieve the Chart object
const chart = worksheet.getCharts().get(idx);
// Add Series
chart.getNSeries().add("$B$1:$C$6", true);
// Add Category Data
chart.getNSeries().setCategoryData("$A$1:$A$6");
// Series has Up Down Bars
chart.getNSeries().get(0).setHasUpDownBars(true);
// Set the colors of Up and Down Bars
chart.getNSeries().get(0).getUpBars().getArea().setForegroundColor(AsposeCells.Color.Green);
chart.getNSeries().get(0).getDownBars().getArea().setForegroundColor(AsposeCells.Color.Red);
// Make both Series Lines invisible
chart.getNSeries().get(0).getBorder().setIsVisible(false);
chart.getNSeries().get(1).getBorder().setIsVisible(false);
// Set the Plot Area Formatting Automatic
chart.getPlotArea().getArea().setFormatting(AsposeCells.FormattingType.Automatic);
// Delete the Legend
chart.getLegend().getLegendEntries().get(0).setIsDeleted(true);
chart.getLegend().getLegendEntries().get(1).setIsDeleted(true);
// Save the workbook
workbook.save(path.join(dataDir, "output_out.xlsx"));