ActiveReports 16 .NET Edition
ActiveReports 16 User Guide / Concepts / Page Report/RDL Report Concepts / Toolbox / Chart / Plots / Scatter and Bubble Charts
In This Topic
    Scatter and Bubble Charts
    In This Topic

    Scatter and Bubble plots are chart types used to visualize relationships between value points. Both plots arrange data values along the vertical and horizontal axes and display points called Symbols on the intersections.

    Scatter Chart

    A scatter chart visualizes relationships between two variables. The Scatter graph uses dots to represent two different numeric variables. For example, the scatter chart can be used to depict the correlation between variables like GDP per capita and life expectancy. 

    Simple Scatter Chart

    A Simple Scatter Plot visualizes relationships between two variables. For instance, the Simple Scatter Charts can be used to depict the correlation between life expectancy and GDP per Capita. See Create Scatter Chart walkthrough to learn how to create this chart.

    Simple Scatter Chart

    Simple Scatter Chart

    Bubble Chart

    Bubble charts are used while plotting data points in terms of three numeric parameters. Note that the third numeric parameter is represented by the bubble's diameter. A bubble plot simply adds the third variable by encoding it into the size of the displayed symbols. For instance, the bubble chart can be used to depict the correlation between the diameter of a tree, its height, and volume.

    Simple Bubble Chart

    A Simple Bubble chart adds a third variable into visualization by encoding it into the size of the showcased symbols. For instance, the simple bubble chart can be used to display the correlation between a tree's diameter, its height and volume. See Create Bubble Chart walkthrough to learn how to create this chart.

    Simple Bubble Chart

    Simple Bubble Chart

    Multi-Category Scatter and Bubble Charts

    The Multi-Category Scatter and Bubble chart splits the data values into categories and visualizes them using the shape and color of the symbol. For example, the multi-category scatter chart can be used to display the correlation between the life expectancy and GDP per capita categorized by the continent.

    Multi-Category Scatter Chart

    Multi-Category Scatter Chart

    Scatter and Bubble Plot Properties

    The Scatter and Bubble Plot properties discussed below can be accessed from the Properties Panel on selecting the Chart > Plot from the Report Explorer. You can access some of the important properties from the Plot's Smart Panel too. See Chart Smart Panels topic for more information. Both the Properties Panel and the Smart Panel can be accessed by right-clicking the plot in the design area.

    Common

    Action

    The action to perform when the Scatter Plot is clicked. The action can be a hyperlink, a bookmark, or a drill-through. 

    Labels

    The data labels for each area chart.

    Name

    The name of the plot. By default, a chart containing a single plot has the plot name as 'Plot1'.

    Symbols

    Represents the properties that allow you to customize the look of symbols that form the Scatter plot.

    Tooltip Template

    Contains the tooltip template settings. You can choose from the list of predefined settings or set your own in the Expression Editor.

    Configurations

    ClippingMode

    The Clipping Mode determines how a plot extends within the plot area. The ClippingMode can be set to

    Overlays

    Overlays property is a collection for superimposing the data trend on a plot. For more information, see Trendlines topic.

    Rules

    Rules control the appearance of plots based on specified conditions. For more information on conditions, see Rules.

    ShowNulls

    Represents how null or empty values should be shown in the plot - Gaps (default), Connected, or Zeros.

    SymbolOpacity

    Represents the opacity value of symbol fill color.

    Encodings

    Category Encoding 

    The Category Encoding of a Scatter Plot is a set of properties that determine the period over which the plot generates connected data points representing those above Data Values. The Category encoding includes the following properties.

    Values

    The Values property is the collection and takes the field as a category.

    SortingField

    The SortingField defines the order in which the categories are displayed. It takes the default same as the Values field, but you can also specify another field to sort the categories.

    SortDirection

    The SortDirection defines the ascending or descending order in which the categories should be sorted.

    SortingAggregate

    The SortingAggregate property specifies the aggregate to use for sorting the categories. 

    Color Encoding

    The Color Encoding enables the color legend of the Details or Category Encoding. It includes the following properties:

    Aggregate

    Aggregates the value of Color expression.

    ShowValuesName

    If set to True, the legend is displayed based on the value specified in Details encoding or Color encoding.

    Values

    The Values is the collection where the value of the Color expression is specified. However, the Scatter Plots take the first item from the collection.

    Details Encoding

    The Details Encoding breaks down the data values into subcategories and produces additional groups. The Details property is the collection of items and each item includes the following properties that define the Details encoding:

    Shape Encoding

    The Shape Encoding enables the shape legend of the Details or Category Encoding in Scatter charts. It includes the Aggregate function and the shape expression, which is elaborated below:

    Aggregate

    To show aggregated values such as Average, Count, and Sum instead of individual values, specify an Aggregate function.

    Value

    The Value property is the collection and usually takes a bound field. However, the Scatter plots take the first item from the collection.

    Size Encoding

    The Size Encoding enables the Aggregate function and Size expression in Bubble charts. The Size Encoding works solely with numeric values and breaks down data values into ranges that determine the symbol size.

    Values Encoding

    The Values encoding specifies the data values and represents the collection of items and each item includes the following properties.

    Type

    The Type property provides 'Simple' and 'Complex' options to choose from. However, for Scatter Plots, 'Simple' is acceptable.

    Value

    The Value property is the collection and usually takes a bound field. However, the Scatter Plots take the first item from the collection.

    Aggregate

    To show aggregated values such as Average, Count, and Sum instead of individual values, specify an Aggregate function.

    Text Encoding

    The Text Encoding provides support of any dataset field in chart labels and tooltips and allows displaying additional info on the chart. When two text encodings are added, they are displayed by default with the ";" delimiter. A text encoding includes the following properties:

    Aggregate

    Aggregates the value of the Text expression.

    Target

    Specifies whether this text is for a Label or a Tooltip Label. The label format is controlled with the chart's Labels > Template property or Tooltip Template property.

    The Template property can use both the predefined values and the added text encoding fields, for example:

    Count:{Text0}
    Sum:{valueField.value}

    Template Key

    A unique key, used in the chart plot's Labels > Template and Tooltip Template to access the text encoding value.

    Value

    A field, constant or expression to be displayed.

    See Also