Specify Both X And Y

sample image

View model

using CommunityToolkit.Mvvm.ComponentModel;
using LiveChartsCore;
using LiveChartsCore.Defaults;
using LiveChartsCore.SkiaSharpView;

namespace ViewModelsSamples.Lines.XY;

public partial class ViewModel : ObservableObject
{
    public ISeries[] Series { get; set; } =
    {
        new LineSeries<ObservablePoint>
        {
            Values = new ObservablePoint[]
            {
                new ObservablePoint(0, 4),
                new ObservablePoint(1, 3),
                new ObservablePoint(3, 8),
                new ObservablePoint(18, 6),
                new ObservablePoint(20, 12)
            }
        }
    };
}


using Eto.Forms;
using LiveChartsCore.SkiaSharpView.Eto;
using ViewModelsSamples.Lines.XY;

namespace EtoFormsSample.Lines.XY;

public class View : Panel
{
    private readonly CartesianChart cartesianChart;

    public View()
    {
        var viewModel = new ViewModel();

        cartesianChart = new CartesianChart
        {
            Series = viewModel.Series,
        };

        Content = cartesianChart;
    }
}

Articles you might also find useful:

Cartesian chart control
Line series properties