Get Equation Text of Chart Trendline
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You can retrieve the Equation Text of Chart Trendline using Aspose.Cells. Aspose.Cells provides Trendline.getDataLabels().getText() property which returns the Equation Text of chart trendline. To make use of this property, you will first have to call Chart.calculate() method.
Example
The following screenshot shows the Chart with a Trendline and its Equation Text is shown in Red color. We will retrieve this text using the Trendline.getDataLabels().getText() property in the following sample code.
Java code to get the equation text of chart trendline
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// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-Java | |
// The path to the documents directory. | |
String dataDir = Utils.getDataDir(GetWorksheetOfChart.class); | |
// Create workbook object from source Excel file | |
Workbook workbook = new Workbook(dataDir + "source.xlsx"); | |
// Access the first worksheet | |
Worksheet worksheet = workbook.getWorksheets().get(0); | |
// Access the first chart inside the worksheet | |
Chart chart = worksheet.getCharts().get(0); | |
// Calculate the Chart first to get the Equation Text of Trendline | |
chart.calculate(); | |
// Access the Trendline | |
Trendline trendLine = chart.getNSeries().get(0).getTrendLines().get(0); | |
// Read the Equation Text of Trendline | |
System.out.println("Equation Text: " + trendLine.getDataLabels().getText()); |
Output generated by the sample code
This is the console output of the above sample code.
Equation Text: y = 8.1333x + 5