How to Set a Fixed Number of X-Axis Labels in LiveCharts2?

[beto-rodriguez]

Discussed in #1098

^{Originally posted by xiaotebie July 5, 2023}
Hello,

I am currently using LiveCharts2 in my WPF application and I have a question about setting a fixed number of x-axis labels.

In my application, I want to display a fixed number of labels on the x-axis, regardless of the number of data points in my series. For example, I want to display 10 labels on the x-axis, but I might only have 7 data points in my series.

I tried to set the Labels property of the Axis object to a string array of 10 elements, but it didn't work as expected. The x-axis still only showed labels for the 7 data points in my series, and it didn't display the remaining 3 labels.

Here is a snippet of my code:

public ISeries[] Series { get; set; } = new ISeries[]
    {
        new LineSeries<double>
        {
            Values = new double[] { 2, 1, 3, 5, 3, 4, 6 },
            Fill = null
        }
    };

public Axis[] XAxes { get; set; }
    = new Axis[]
    {
        new Axis
        {
            Name = "X Axis",
            NamePaint = new SolidColorPaint(SKColors.Black),
            LabelsPaint = new SolidColorPaint(SKColors.Blue),
            TextSize = 10,
            Labels = new string[] { "1", "2", "3", "4" ,"5","6","7","8","9","10"},
            SeparatorsPaint = new SolidColorPaint(SKColors.LightSlateGray) { StrokeThickness = 2 }
        }
    };

Is there a way to achieve this in LiveCharts2? Any help would be greatly appreciated.

Thank you in advance!

[beto-rodriguez]

Hi! this is not implemented yet.

This is a necessary, the library needs to provide a solution for this, I have seen a couple of similar issues related to this.
I transferred the discussion to an issue, so we can track the implementation of this.

[beto-rodriguez]

This is already implemented in the beta.810 version, thanks for the report, here is an example:

https://github.com/beto-rodriguez/LiveCharts2/blob/master/samples/ViewModelsSamples/Axes/CustomSeparatorsInterval/ViewModel.cs

[daltzctr]

What if the X axis labels are not known at compile time? Basically, if the X axis is time in a live chart?

[xiaotebie]

This is already implemented in the beta.810 version, thanks for the report, here is an example:

https://github.com/beto-rodriguez/LiveCharts2/blob/master/samples/ViewModelsSamples/Axes/CustomSeparatorsInterval/ViewModel.cs

Thank you so much for your help!