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Navigation: Code Documentation > RSFMXCharts > FMX.RS.ChartFunction > Classes > TRSFMXCustomChartFunction > Methods

TRSFMXCustomChartFunction.PopnVariance(TRSCustomChart,Integer,Integer,TDateTime,Integer) Method

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Calculates the population variance of all values in the SourceChart over the time period, using the n method (biased): TotalVariance / n.

Namespace: FMX.RS.ChartFunction

Parameters

SourceChart

Type: TRSCustomChart

Chart to calculate the maximum from

IndexLow

Type: Integer

Lower bounds index into the SourceChart

IndexHigh

Type: Integer

Upper bounds index into the SourceChart
 

TimeStamp

Type: TDateTime

TimeStamp of the new value

SourceDim

Type: Integer

Return Value

Type: TRSChartValueType

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