How to set Logarithmic axis for chart in Excel document?

26 Apr 20243 minutes to read

The following code snippet shows how to set Logarithmic axis for chart in Excel document.

C# [Cross-platform]

using (ExcelEngine excelEngine = new ExcelEngine())
{
    IApplication application = excelEngine.Excel;
    application.DefaultVersion = ExcelVersion.Xlsx;
    FileStream inputStream = new FileStream("InputTemplate.xlsx", FileMode.Open, FileAccess.Read);
    IWorkbook workbook = application.Workbooks.Open(inputStream, ExcelOpenType.Automatic);
    IWorksheet sheet = workbook.Worksheets[0];

    //Create a Chart
    IChartShape chart = sheet.Charts.Add();

    //Set Chart Type
    chart.ChartType = ExcelChartType.Column_Clustered;

    //Set data range in the worksheet
    chart.DataRange = sheet.Range["A1:C6"];

    //Set chart value axis
    IChartValueAxis valueAxis = chart.PrimaryValueAxis;

    //Set IsLogScale and log base
    valueAxis.IsLogScale = true;
    valueAxis.LogBase = 10;

    //Saving the workbook
    FileStream outputStream = new FileStream("Chart.xlsx", FileMode.Create, FileAccess.Write);
    workbook.SaveAs(outputStream);

    //Dispose streams
    outputStream.Dispose();
    inputStream.Dispose();
}

C# [Windows-specific]

using (ExcelEngine excelEngine = new ExcelEngine())
{
    IApplication application = excelEngine.Excel;
  application.DefaultVersion = ExcelVersion.Excel2013;
  IWorkbook workbook = application.Workbooks.Open("InputTemplate.xlsx", ExcelOpenType.Automatic);
  IWorksheet sheet = workbook.Worksheets[0];

   //Create a Chart
    IChartShape chart = sheet.Charts.Add();

    //Set Chart Type
    chart.ChartType = ExcelChartType.Column_Clustered;

    //Set data range in the worksheet
    chart.DataRange = sheet.Range["A1:C6"];

    //Set chart value axis
    IChartValueAxis valueAxis = chart.PrimaryValueAxis;

    //Set IsLogScale and log base
    valueAxis.IsLogScale = true;
    valueAxis.LogBase = 10;

    //Saving the workbook
    workbook.SaveAs("Chart.xlsx");
}

VB.NET [Windows-specific]

Using excelEngine As New ExcelEngine()
    Dim application As IApplication = excelEngine.Excel
    application.DefaultVersion = ExcelVersion.Xlsx
    Dim workbook As IWorkbook = application.Workbooks.Open(InputTemplate.xlsx", ExcelOpenType.Automatic)
    Dim sheet As IWorksheet = workbook.Worksheets(0)

    ' Create a Chart
    Dim chart As IChartShape = sheet.Charts.Add()

    ' Set Chart Type
    chart.ChartType = ExcelChartType.Column_Clustered

    ' Set data range in the worksheet
    chart.DataRange = sheet.Range("A1:C6")

    ' Set chart value axis
    Dim valueAxis As IChartValueAxis = chart.PrimaryValueAxis

    ' Set IsLogScale and log base
    valueAxis.IsLogScale = True
    valueAxis.LogBase = 10

    ' Saving the workbook
    workbook.SaveAs(outputStream)

End Using