The Bubble Chart, which is basically a type of the Scatter Chart, is used for graphical representation of multi-dimensional data. It displays an additional data value at each point by changing its size. The chart type represents data points in the form of bubbles (data markers) whose X and Y coordinates are determined by two data values and whose size indicates the value of a third variable.

To create the Bubble Chart, you need to set the ChartType property to Bubble either in the Properties window (at design-time) or code behind (at run-time). You can also set the same in XAML.

Bubble Chart

Below is the implementation in code:

<c1:C1FlexChart x:Name="flexChart" 
                BindingX="X" 
                ItemsSource="{Binding DataContext.Data}" 
                ChartType="Bubble">
    <c1:C1FlexChart.Series>
        <c1:Series SeriesName="Bubble" 
                   Binding="Y,Size"/>
    </c1:C1FlexChart.Series>
</c1:C1FlexChart>

flexChart.ChartType = ChartType.Bubble;