Bubbles Or Weigthed Series

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;

[ObservableObject]
public partial class ViewModel
{
    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="UnoWinUISample.Scatter.Bubbles.View"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:lvc="using:LiveChartsCore.SkiaSharpView.Uno.WinUI"
    xmlns:vms="using:ViewModelsSamples.Scatter.Bubbles"
    mc:Ignorable="d">

    <UserControl.DataContext>
        <vms:ViewModel/>
    </UserControl.DataContext>
    <Grid>
        <lvc:CartesianChart Series="{Binding Series}"></lvc:CartesianChart>
    </Grid>

</UserControl>

Articles you might also find useful: