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TRSCustomChartFunction.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: RSChartFunction

expandingSyntax

Delphi

public
  class function PopnVariance(const SourceChart: TRSCustomChart;
  IndexLow, IndexHigh: Integer; var TimeStamp: TDateTime;
  SourceDim: Integer): TRSChartValueType; overload;
 

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

expandingRemarks

Note that this function is a class procedure so it may be called even if the TRSCustomChartFunction is not instantiated.

The function can also be called by custom functions. For example, you could create a custom function that calls this function and then does something with the result

expandingSee Also

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RiverSoftAVG Charting Component Suite (RCCS) © 2005-2015, Thomas G. Grubb