ISmExponentialSmoothing.ModelPeriod

Syntax

ModelPeriod: IStatPeriod;

Description

The ModelPeriod property determines sample period parameters.

Example

Sub Main;

Var

Method: SmExponentialSmoothing;

serie: Array Of Double;

status: Integer;

Period: IStatPeriod;

Sub Print(Data: Array Of Double);

Var

i: Integer;

CI: ICultureInfo;

Begin

CI := CultureInfo.Current;

Debug.WriteLine("---Begin---");

For i := 0 To Data.Length - 1 Do

If Double.IsNan(Data[i]) Then

Debug.WriteLine("---empty---");

Else

Debug.WriteLine(i.ToString + ", " + CI.FormatDoublePrec(Data[i], 4));

End If;

End For;

Debug.WriteLine("---End---");

End Sub Print;

Begin

Method := New SmExponentialSmoothing.Create;

serie := New Double[15];

serie[0] := 670.2000183;

serie[1] := 576.0680563;

serie[2] := 717.6484268;

serie[3] := 856.9105808;

serie[4] := 885.4609516;

serie[5] := 1011.846431;

serie[6] := 995.4496292;

serie[7] := 1064.74221;

serie[8] := 1033.324656;

serie[9] := 780.8584552;

serie[10] := 657.5033113;

serie[11] := 654.5472579;

serie[12] := 678.2380139;

serie[13] := 642.4128544;

serie[14] := 751.9611194;

Method.Serie.Value := serie;

Method.Forecast.LastPoint := 40;

Period := Method.ModelPeriod;

Period.FirstPoint := 4;

Period.LastPoint := 15;

Method.MissingData.Method := MissingDataMethod.LinInterpolation;

status := Method.Execute;

If status <> 0 Then

Debug.WriteLine(Method.Errors);

Else

Debug.WriteLine("=== Modeling series ===");

Print(Method.Fitted);

End If;

End Sub Main;

After executing the example the console window displays the following results:

Module execution started

=== Modeling series ===

---Begin---

0, ---empty---

1, ---empty---

2, ---empty---

3, 759,9877

4, 769,6800

5, 781,2581

6, 804,3169

7, 823,4302

8, 847,5614

9, 866,1377

10, 857,6098

11, 837,5992

12, 819,2940

13, 805,1884

14, 788,9108

---End---

Module execution finished