使用Node.js通过C++在饼图或饼状图中的第二个饼或柱子中查找数据点

可能的使用场景

你可以使用Aspose.Cells for Node.js via C++找到系列数据点是否在饼的饼图的第二个饼中或在饼的柱图的柱中。请使用ChartPoint.isInSecondaryPlot()属性来判断。

请下载示例Excel文件，并查看其控制台输出。若打开该文件，你会发现所有值小于10的数据点都在饼的柱图的柱内，如控制台输出所示。

查找数据点是否在饼图的第二个饼图或柱状图的柱状图上

以下示例代码展示了如何判断数据点是否在饼的饼或饼的柱图中的第二个饼或柱子。

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

// The path to the documents directory.
const dataDir = path.join(__dirname, "data");
// Load source excel file containing Bar of Pie chart
const workbook = new AsposeCells.Workbook(path.join(dataDir, "PieBars.xlsx"));

// Access first worksheet
const worksheet = workbook.getWorksheets().get(0);

// Access first chart which is Bar of Pie chart and calculate it
const chart = worksheet.getCharts().get(0);
chart.calculate();

// Access the chart series
const series = chart.getNSeries().get(0);

/* 
* Print the data points of the chart series and 
* check its IsInSecondaryPlot property to determine 
* if data point is inside the bar or pie 
*/
for (let i = 0; i < series.getPoints().getCount(); i++) {
// Access chart point
const chartPoint = series.getPoints().get(i);

// Skip null values
if (chartPoint.get_YValue() === null) continue;

/* 
* Print the chart point value and see if it is inside bar or pie.
* If the IsInSecondaryPlot is true, then the data point is inside bar 
* otherwise it is inside the pie. 
*/
console.log("Value: " + chartPoint.get_YValue());
console.log("IsInSecondaryPlot: " + chartPoint.isInSecondaryPlot());
console.log();
}

控制台输出

请参阅在执行上述示例代码后，用示例Excel文件生成的控制台输出。如果ChartPoint.isInSecondaryPlot()返回false，表示数据点在饼内；若为true，则在柱内。

  
 Value: 15  
IsInSecondaryPlot: false  

Value: 9  
IsInSecondaryPlot: true  

Value: 2  
IsInSecondaryPlot: true  

Value: 40  
IsInSecondaryPlot: false  

Value: 5  
IsInSecondaryPlot: true  

Value: 4  
IsInSecondaryPlot: true  

Value: 25  
IsInSecondaryPlot: false