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I changed my NumericalAxis to LogarithmicNumericAxis in runtime as below

var yAxis = new LogarithmicNumericAxis
{
    TextFormatting = "#.#E+0",
    ScientificNotation = ScientificNotation.LogarithmicBase,                                
    GrowBy = new DoubleRange(0.1, 0.1),
    DrawMajorBands = false
};
yAxis.AxisTitle = chart2d.YAxes[0].AxisTitle;
chart2d.YAxes[0] = yAxis;

I can see my data points are correctly log-scaled but Y-Axis is disappeared and CursorModifier display Y-values as ‘NaN’.
Should I do something more than simply replacing Axis instance to other?
(I already checked a LogAxis example but I can’t use XAML in this case)

Version
4.0.5.8246
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Hi there,

You probably need to set a valid VisibleRange on the LogarithmicNumericAxis as well, but I’m not sure.

We actually have an example on switching between Linear and Logarithmic Axis at Runtime in WPF Charts here:

enter image description here

Take a look, it might give you just the idea you need!

Best regards,
Andrew

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