JavaScript与C++中的X轴与类别轴对比
Contents
[
Hide
]
可能的使用场景
X轴有不同类型。而Y轴是一个值类型轴，X轴可以是分类类型轴或值类型轴。使用值轴，数据被视为连续变化的数值数据，并且标记位于沿轴的变动点，其位置根据其数值而变化。使用分类轴，数据被视为一系列非数值文本标签，并且标记位于沿轴的一个位置，其位置根据其在序列中的位置而变化。下面的示例说明了值轴和分类轴之间的区别。 我们的示例数据如下图中的示例表文件所示。第一列包含我们的X轴数据，可以视为分类或值。请注意，数字不是等间距的，也不按照数字顺序出现。
处理X轴和分类轴，就像处理Microsoft Excel一样
我们将在两种类型的图表上显示这些数据，第一种是XY（散点）图，X作为值轴，第二种是折线图，X作为类别轴。
示例代码
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>Aspose.Cells Example - Charts and X Axis</h1>
<input type="file" id="fileInput" accept=".xls,.xlsx,.csv" />
<button id="runExample">Run Example</button>
<a id="downloadLink" style="display: none;">Download Result</a>
<div id="result"></div>
</body>
<script src="aspose.cells.js.min.js"></script>
<script type="text/javascript">
const { Workbook, SaveFormat, ChartType, LegendPositionType, FillType, Utils } = AsposeCells;
AsposeCells.onReady({
license: "/lic/aspose.cells.enc",
fontPath: "/fonts/",
fontList: [
"arial.ttf",
"NotoSansSC-Regular.ttf"
]
}).then(() => {
console.log("Aspose.Cells initialized");
});
document.getElementById('runExample').addEventListener('click', async () => {
const fileInput = document.getElementById('fileInput');
if (!fileInput.files.length) {
document.getElementById('result').innerHTML = '<p style="color: red;">Please select an Excel file.</p>';
return;
}
const file = fileInput.files[0];
const arrayBuffer = await file.arrayBuffer();
// Loads the workbook which contains hidden external links
const workbook = new Workbook(new Uint8Array(arrayBuffer));
// Access the first worksheet.
const worksheet = workbook.worksheets.get(0);
// Put the sample values used in charts
worksheet.cells.get("A2").putValue(1);
worksheet.cells.get("A3").putValue(3);
worksheet.cells.get("A4").putValue(2.5);
worksheet.cells.get("A5").putValue(3.5);
worksheet.cells.get("B1").putValue("Cats");
worksheet.cells.get("C1").putValue("Dogs");
worksheet.cells.get("D1").putValue("Fishes");
worksheet.cells.get("B2").putValue(7);
worksheet.cells.get("B3").putValue(6);
worksheet.cells.get("B4").putValue(5);
worksheet.cells.get("B5").putValue(4);
worksheet.cells.get("C2").putValue(7);
worksheet.cells.get("C3").putValue(5);
worksheet.cells.get("C4").putValue(4);
worksheet.cells.get("C5").putValue(3);
worksheet.cells.get("D2").putValue(8);
worksheet.cells.get("D3").putValue(7);
worksheet.cells.get("D4").putValue(3);
worksheet.cells.get("D5").putValue(2);
// Create Line Chart: X as Category Axis
let pieIdx = worksheet.charts.add(ChartType.LineWithDataMarkers, 6, 15, 20, 21);
// Retrieve the Chart object
let chart = worksheet.charts.get(pieIdx);
// Add Series
chart.nSeries.add("B2:D5", true);
// Set the category data
chart.nSeries.categoryData = "=Sheet1!$A$2:$A$5";
// Set the first series name
chart.nSeries.get(0).name = "Cats";
// Set the second series name
chart.nSeries.get(1).name = "Dogs";
// Set the third series name
chart.nSeries.get(2).name = "Fishes";
// Set the Legend at the bottom of the chart area
chart.legend.position = LegendPositionType.Bottom;
// Fill the PlotArea area with nothing
chart.plotArea.area.fillFormat.fillType = FillType.None;
// Create XY (Scatter) Chart: X as Value Axis
pieIdx = worksheet.charts.add(ChartType.ScatterConnectedByLinesWithDataMarker, 6, 6, 20, 12);
// Retrieve the Chart object
chart = worksheet.charts.get(pieIdx);
// Add Series
chart.nSeries.add("B2:D5", true);
// Set X values for series
chart.nSeries.get(0).xValues = "{1,3,2.5,3.5}";
chart.nSeries.get(1).xValues = "{1,3,2.5,3.5}";
chart.nSeries.get(2).xValues = "{1,3,2.5,3.5}";
// Set the first series name
chart.nSeries.get(0).name = "Cats";
// Set the second series name
chart.nSeries.get(1).name = "Dogs";
// Set the third series name
chart.nSeries.get(2).name = "Fishes";
// Set the Legend at the bottom of the chart area
chart.legend.position = LegendPositionType.Bottom;
// Fill the PlotArea area with nothing
chart.plotArea.area.fillFormat.fillType = FillType.None;
// Saving the modified Excel file
const outputData = workbook.save(SaveFormat.Xlsx);
const blob = new Blob([outputData]);
const downloadLink = document.getElementById('downloadLink');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'XAxis.xlsx';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download Excel File';
document.getElementById('result').innerHTML = '<p style="color: green;">Operation completed successfully! Click the download link to get the modified file.</p>';
});
</script>
</html>