ActiveReports 16 .NET Edition
ActiveReports 16 User Guide / Concepts / Page Report/RDL Report Concepts / Toolbox / Chart / Trendlines / Logarithmic Trendline
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    Logarithmic Trendline
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    A Logarithmic trendline creates a best-fit curved line that illustrates how data values increase or decrease and then level out. This trendline uses the following equation:

    y=c ln x + b

    where "c" and "b" are constants, and "ln" is the natural logarithm function.

    Property Description
    BackwardForecastPeriod Sets a number of periods that the forecast extends backward.
    DetailLevel Specifies if the overlay calculation should include the entire data set or each detail group. Select from Total or Group.
    FieldName Sets the field name for the reference line to use.
    ForwardForecastPeriod Sets a number of periods that the forecast extends forward.
    LegendLabel Sets the legend label of the trendline.


    Sets the display position. Select from Front or Back.


    Enter the name of the trendline.

    Select the type of the trendline from the list of available types.

    LineStyle Sets the style of the line. Select the LineColor, LineStyle and LineWidth properties of the line.

    Chart Trendlines - Logarithmic

    In the OverlayDesigner Collection Editor, you can set a Logarithmic trendline with the properties as follows.

    Property Value
    LineStyle > LineColor Red
    LineStyle > LineStyle Solid
    LineStyle > LineWidth 3pt
    Configurations > BackwardForecastPeriod 0
    Configurations > DetailLevel Total
    Configurations > ForwardForecastPeriod 0
    General > Display Front
    General > Type LogarithmicTrendline