ComponentOne FlexChart for UWP
FlexChart / Understanding FlexChart / FlexChart Types / Bubble
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    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.

    Therefore, in addition to X and Y you must specify a binding for the bubble size. This is done by setting the binding property to a comma-delimited string that specifies the name of the properties to be used for the Y and size values for each bubble.
    In this example, the chart is bound to a list containing objects with "x", "y", and "size" properties. The chart contains a single series and its binding property is set to the string "y,size".


    To create the Bubble Chart, you need to set the ChartType property to Bubble.

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    <Chart:C1FlexChart ItemsSource="{Binding}" ChartType="Bubble"  BindingX="X" Binding="Y,Size" Xaml:C1NagScreen.Nag="True" Margin="0,10,-83,0">