IsEmpty: Boolean;
The IsEmpty property determines whether a series is empty.
Available values:
True. Series is empty.
False. Series contains data.
Custom series calculation method is given in the example.
Add links to the MathFin, Ms, Transform system assemblies.
Function IsEmpty(Input: ITimeSeries): ITimeSeries;
Var
TsCalc: TsCalculation;
pContext: ITsCalculationContext;
i: Integer;
Output: ITimeSeries;
Begin
// Check if an input series is empty
If Not Input.IsEmpty
// If series is not empty, calculate its base-10 logarithm
Then
TsCalc := New TsCalculation.Create;
pContext := TsCalc.Current;
Output := pContext.CreateTimeSeries;
For i := Input.StartIndex To Input.EndIndex Do
Output(i) := Math.Log10(Input(i));
End For;
// Return calculation results
Return Output;
// If series
is empty, return it without changes
Else
Return Input;
End If;
End Function IsEmpty;
The method calculates base-10 logarithm if series contains data.
See also: