Bubbles Or Weigthed Series

The [ObservableObject], [ObservableProperty] and [ICommand] attributes come from the CommunityToolkit.Mvvm package, you can read more about it here.

This web site wraps every sample using a UserControl instance, but LiveCharts controls can be used inside any container.

sample image

View model

using System;
using System.Collections.ObjectModel;
using LiveChartsCore;
using LiveChartsCore.Defaults;
using LiveChartsCore.SkiaSharpView;
using LiveChartsCore.SkiaSharpView.Drawing.Geometries;
using CommunityToolkit.Mvvm.ComponentModel;

namespace ViewModelsSamples.Scatter.Bubbles;

public partial class ViewModel : ObservableObject
    public ViewModel()
        var r = new Random();
        var values1 = new ObservableCollection<WeightedPoint>();
        var values2 = new ObservableCollection<WeightedPoint>();

        for (var i = 0; i < 8; i++)
            // the WeightedPoint has 3 properties, X, Y and Weight
            // we use the X and Y coordinates to position the point in the chart
            // the weight will be used by the library to define the size of the points

            // where the minimum weight will be the smallest point, and the max weight the biggest

            // for any weight between these limits the library
            // will interpolate lineally to determine the size of each point

            var x = r.Next(0, 20);
            var y = r.Next(0, 20);
            var w = r.Next(0, 100);

            values1.Add(new WeightedPoint(x, y, w));

            // we do the same for our seconds values collection.
            values2.Add(new WeightedPoint(r.Next(0, 20), r.Next(0, 20), r.Next(0, 100)));

        Series = new ISeries[]
            new ScatterSeries<WeightedPoint>
                Values = values1,
                GeometrySize = 50,
                MinGeometrySize = 5
            new ScatterSeries<WeightedPoint, RoundedRectangleGeometry>
                Values = values2,
                GeometrySize = 50,
                MinGeometrySize = 5

    public ISeries[] Series { get; set; }


<UserControl x:Class="AvaloniaSample.Scatter.Bubbles.View"
      <RowDefinition Height="*"/>
    <lvc:CartesianChart Series="{Binding Series}"></lvc:CartesianChart>

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