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AxisScaling.LogBase Property
Gets or sets a value specifying a logarithmic base for the logarithmic axis.
Namespace: DevExpress.Spreadsheet.Charts
Assembly: DevExpress.Spreadsheet.v19.2.Core.dll
Declaration
Property Value
| Type | Description |
|---|---|
| Double | A Double value that is the logarithmic base. This value must be greater than or equal to two. |
Property Value
| Type | Description |
|---|---|
| Double | A Double value that is the logarithmic base. This value must be greater than or equal to two. |
Property Value
| Type | Description |
|---|---|
| Double | A Double value that is the logarithmic base. This value must be greater than or equal to two. |
Remarks
If the AxisScaling.LogScale property is set to true, use the LogBase property to specify the logarithmic base.
With the LogBase property, you can define a base value as a logarithm that will be used to calculate the axis values.
The images in the table below demonstrate how the LogBase property works.
| LogBase = 10 | LogBase = 20 |
|---|---|
 |
 |
Examples
The example below demonstrates how to create a simple line chart and change the value axis to logarithmic using the AxisScaling.LogScale property. The logarithmic base, defined by the AxisScaling.LogBase property, is set to 10.
Note
A complete sample project is available at https://github.com/DevExpress-Examples/winforms-spreadsheet-chart-api-e5222
Dim worksheet As Worksheet = workbook.Worksheets("chartTask5")
workbook.Worksheets.ActiveWorksheet = worksheet
' Create a chart and specify its location.
Dim chart As Chart = worksheet.Charts.Add(ChartType.Line, worksheet("B2:D8"))
chart.TopLeftCell = worksheet.Cells("F2")
chart.BottomRightCell = worksheet.Cells("L15")
' Set the logarithmic(Log10) type of scale.
chart.PrimaryAxes(1).Scaling.LogScale = True
chart.PrimaryAxes(1).Scaling.LogBase = 10
' Set the position of the legend on the chart.
chart.Legend.Position = LegendPosition.Bottom