^{IAddFunction
Hierarchy}

<sup>Type Library
TeeChartx

Description
AddFunction may be added to your project by Chart Editor at design time or at runtime using code. Default period for the AddFunction when only 1 series is added to the function is 0 (One flat line representing the total of all data points of the input series). When 2 or more input series form the AddFunction series the default period is 1 axis point. Period is applicable only to the number of axis points, Period 1 = 1 axis point; period 2 = 2 axis points, etc..</sup>

^Example

^{To set the period for AddFunction you should use the FunctionType property of Series}

^{To define a function series by code you should first create a new series for the function. The series may be of any type.}

^{Visual Basic}

^{{Set the function using the SetFunction method}.}

^{TChart1.Series(0).SetFunction tfAdd}

^{{You may then define the period for the function - here setting it to to 5}}

^{TChart1.Series( 0 ).FunctionType.Period = 5}

^{To undefine (delete) a function defined for the series you should either delete the Series, make it inactive, or reassign the datasource to another Function or other.}