JavaScriptを使った高値・安値・終値（HLC）株価チャートの作成（C++経由）
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可能な使用シナリオ
ハイロークローズ（HLC）株価チャートは4つのデータ列を使用します。最初の列はカテゴリ（通常は日付、株名も使用可）、次の3列は高値、安値、終値です。各カテゴリーの価格範囲は、低値から高値までの垂直線で示され、終値はこの線の右側に伸びるティックマークで表示されます。
チャートの可視性の改善
時には、チャートを直感的に見やすくするために、マーカー（終値）の外観を修正したり、2次軸に表示したりすることがあります。
サンプルコード
次のサンプルコードはsample Excel fileをロードし、output Excel fileを生成します。
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>High-Low-Close Stock Chart Example</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, Worksheet, Cell, 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();
// Create an instance of Workbook from the uploaded file
const workbook = new Workbook(new Uint8Array(arrayBuffer));
// Access the first worksheet.
const worksheet = workbook.worksheets.get(0);
// Create High-Low-Close-Stock Chart
const pieIdx = worksheet.charts.add(AsposeCells.ChartType.StockHighLowClose, 5, 6, 20, 12);
// Retrieve the Chart object
const chart = worksheet.charts.get(pieIdx);
// Set the legend can be showed
chart.showLegend = true;
// Set the chart title name
chart.title.text = "High-Low-Close Stock";
// Set the Legend at the bottom of the chart area
chart.legend.position = AsposeCells.LegendPositionType.Bottom;
// Set data range (range and orientation)
chart.chartDataRange = ["A1:D9", true];
// Set category data
chart.nSeries.categoryData = "A2:A9";
// Set the marker with the built-in data for the 3rd series (index 2)
const series2 = chart.nSeries.get(2);
const marker = series2.marker;
marker.markerStyle = AsposeCells.ChartMarkerType.Dash;
marker.markerSize = 20;
marker.area.formatting = AsposeCells.FormattingType.Custom;
marker.area.foregroundColor = AsposeCells.Color.Maroon;
// Fill the PlotArea area with nothing
chart.plotArea.area.fillFormat.fillType = AsposeCells.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 = 'out.xlsx';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download Excel File';
document.getElementById('result').innerHTML = '<p style="color: green;">Chart created successfully! Click the download link to get the modified file.</p>';
});
</script>
</html>