How to set category axis with Node.js via C++

Possible Usage Scenarios

After you create a chart in a worksheet, you can set the category axis for it. In this article, we will show you how to set the category axis for an Excel chart using Aspose.Cells with sample code.

The steps in sample code

1. Create a new workbook.

2. Create a new chart in the first worksheet.

3. Add some values to cells in the first worksheet.

4. Now you can set the category axis; there are two ways: using cell data or using strings directly, both of which are shown in the sample code.

5. Set the value axis, and save the workbook to view the result.

Sample Code

const path = require("path");
const AsposeCells = require("aspose.cells.node");

// Your local test path
const dataDir = ""; // Update with your path

// Create a new workbook
const workbook = new AsposeCells.Workbook();
const worksheet = workbook.getWorksheets().get(0);
worksheet.setName("CHART");

// Add a chart to the worksheet
const chartIndex = worksheet.getCharts().add(AsposeCells.ChartType.Column, 8, 0, 20, 10);
const chart = worksheet.getCharts().get(chartIndex);

// Add some values to cells
worksheet.getCells().get("A1").putValue("Sales");
worksheet.getCells().get("A2").putValue(100);
worksheet.getCells().get("A3").putValue(150);
worksheet.getCells().get("A4").putValue(130);
worksheet.getCells().get("A5").putValue(160);
worksheet.getCells().get("A6").putValue(150);
worksheet.getCells().get("B1").putValue("Days");
worksheet.getCells().get("B2").putValue(1);
worksheet.getCells().get("B3").putValue(2);
worksheet.getCells().get("B4").putValue(3);
worksheet.getCells().get("B5").putValue(4);
worksheet.getCells().get("B6").putValue(5);

// Some values in string
const Sales = "100,150,130,160,150";
const Days = "1,2,3,4,5";

// Set Category Axis Data with string
chart.getNSeries().setCategoryData(`{${Days}}`);
// Or you can set Category Axis Data with data in cells
// chart.getNSeries().setCategoryData("B2:B6");

// Add Series to the chart
chart.getNSeries().add("Demand1", true);
// Set value axis with string 
chart.getNSeries().get(0).setValues(`{${Sales}}`);
chart.getNSeries().add("Demand2", true);
// Set value axis with data in cells
chart.getNSeries().get(1).setValues("A2:A6");

// Set some Category Axis properties
chart.getCategoryAxis().getTickLabels().setRotationAngle(45);
chart.getCategoryAxis().getTickLabels().getFont().setSize(8);
chart.getLegend().setPosition(AsposeCells.LegendPositionType.Bottom);

// Save the workbook to view the result file
workbook.save(path + "Output.xlsx");