Bubble heat map in Blazor HeatMap Chart Component

20 Sep 20217 minutes to read

Data points represent the data source values with Gradient or Fixed colors in the heat map. You can customize the appearance of these data points by changing the Color and Shape attributes. The data points can be represented in color fill or bubble shape by defining the TileType property. By default, the data points are color filled with Gradient or Fixed and this depiction of data points is defined as Rect in the TileType property.

The cell customizations and color mapping for Rect tile type is defined in Appearance and Palette sections in detail.

Bubble attributes

The data points can be represented in the bubble along with its attributes by setting the TileType property to Bubble.

In bubble heat map, you can display the data points with bubble size, bubble colors, and sector attributes of the bubble.

Bubble size

In this bubble heat map type, the size factor of the bubble is used to denote the data variations. The radius of the bubble varies according to data values. By default, the bubble with small size denotes the data value with small magnitude and the larger bubble size denotes the data value with larger magnitude. This behavior can be inversed by using the IsInversedBubbleSize property.

To render a bubble heat map with size series, set the BubbleType property to Size.

@using Syncfusion.Blazor.HeatMap

<SfHeatMap DataSource="@HeatMapData">
    <HeatMapTitleSettings Text="Sales Revenue per Employee (in 1000 US$)">
    </HeatMapTitleSettings>
    <HeatMapXAxis Labels="@XAxisLabels"></HeatMapXAxis>
    <HeatMapYAxis Labels="@YAxisLabels"></HeatMapYAxis>
    <HeatMapCellSettings ShowLabel="false" TileType="CellType.Bubble" BubbleType="BubbleType.Size"></HeatMapCellSettings>
    <HeatMapPaletteSettings Type="PaletteType.Gradient">
        <HeatMapPalettes>
            <HeatMapPalette Color="#C06C84"></HeatMapPalette>
            <HeatMapPalette Color="#6C5B7B"></HeatMapPalette>
            <HeatMapPalette Color="#355C7D"></HeatMapPalette>
        </HeatMapPalettes>
    </HeatMapPaletteSettings>
</SfHeatMap>

@code{
    int[,] GetDefaultData()
    {
        int[,] dataSource = new int[,]
        {
            {73, 39, 26, 39, 94, 0},
            {93, 58, 53, 38, 26, 68},
            {99, 28, 22, 4, 66, 90},
            {14, 26, 97, 69, 69, 3},
            {7, 46, 47, 47, 88, 6},
            {41, 55, 73, 23, 3, 79}
        };
        return dataSource;
    }
    string[] XAxisLabels = new string[] {"Nancy", "Andrew", "Janet", "Margaret", "Steven", "Michael", "Robert","Laura", "Anne", "Paul", "Karin", "Mario" };
    string[] YAxisLabels = new string[] { "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
    public object HeatMapData { get; set; }
    protected override void OnInitialized()
    {
        HeatMapData = GetDefaultData();
    }
}

Bubble color

In heat map, defined with this tile type, the data points will be represented with same sized bubbles and the data value variations are represented with the bubble colors.

To represent the data points with variations in bubble colors, set the BubbleType property to Color.

@using Syncfusion.Blazor.HeatMap

<SfHeatMap DataSource="@HeatMapData">
    <HeatMapTitleSettings Text="Sales Revenue per Employee (in 1000 US$)">
    </HeatMapTitleSettings>
    <HeatMapXAxis Labels="@XAxisLabels"></HeatMapXAxis>
    <HeatMapYAxis Labels="@YAxisLabels"></HeatMapYAxis>
    <HeatMapCellSettings ShowLabel="true" TileType="CellType.Bubble" BubbleType="BubbleType.Color"></HeatMapCellSettings>
    <HeatMapPaletteSettings Type="PaletteType.Gradient">
        <HeatMapPalettes>
            <HeatMapPalette Color="#C06C84"></HeatMapPalette>
            <HeatMapPalette Color="#6C5B7B"></HeatMapPalette>
            <HeatMapPalette Color="#355C7D"></HeatMapPalette>
        </HeatMapPalettes>
    </HeatMapPaletteSettings>
</SfHeatMap>

@code{
    int[,] GetDefaultData()
    {
        int[,] dataSource = new int[,]
        {
            {73, 39, 26, 39, 94, 0},
            {93, 58, 53, 38, 26, 68},
            {99, 28, 22, 4, 66, 90},
            {14, 26, 97, 69, 69, 3},
            {7, 46, 47, 47, 88, 6},
            {41, 55, 73, 23, 3, 79}
        };
        return dataSource;
    }
    string[] XAxisLabels = new string[] {"Nancy", "Andrew", "Janet", "Margaret", "Steven", "Michael" };
    string[] YAxisLabels = new string[] { "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
    public object HeatMapData { get; set; }
    protected override void OnInitialized()
    {
        HeatMapData = GetDefaultData();
    }
}

Bubble sector

In this bubble heat map type, the sector of the bubble decides the magnitude of data point. If the sector is large, then the data point value will be high.

To render the data points with bubble sector, set the BubbleType property to Sector.

@using Syncfusion.Blazor.HeatMap

<SfHeatMap DataSource="@HeatMapData">
    <HeatMapTitleSettings Text="Sales Revenue per Employee (in 1000 US$)">
    </HeatMapTitleSettings>
    <HeatMapXAxis Labels="@XAxisLabels"></HeatMapXAxis>
    <HeatMapYAxis Labels="@YAxisLabels"></HeatMapYAxis>
    <HeatMapCellSettings ShowLabel="true" TileType="CellType.Bubble" BubbleType="BubbleType.Sector"></HeatMapCellSettings>
    <HeatMapPaletteSettings Type="PaletteType.Gradient">
        <HeatMapPalettes>
            <HeatMapPalette Color="#C06C84"></HeatMapPalette>
            <HeatMapPalette Color="#6C5B7B"></HeatMapPalette>
            <HeatMapPalette Color="#355C7D"></HeatMapPalette>
        </HeatMapPalettes>
    </HeatMapPaletteSettings>
</SfHeatMap>

@code{
    int[,] GetDefaultData()
    {
        int[,] dataSource = new int[,]
        {
            {73, 39, 26, 39, 94, 0},
            {93, 58, 53, 38, 26, 68},
            {99, 28, 22, 4, 66, 90},
            {14, 26, 97, 69, 69, 3},
            {7, 46, 47, 47, 88, 6},
            {41, 55, 73, 23, 3, 79}
        };
        return dataSource;
    }
    string[] XAxisLabels = new string[] {"Nancy", "Andrew", "Janet", "Margaret", "Steven", "Michael" };
    string[] YAxisLabels = new string[] { "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
    public object HeatMapData { get; set; }
    protected override void OnInitialized()
    {
        HeatMapData = GetDefaultData();
    }
}