ICurveEstimationExplanatory.Serie

Syntax

Description

The Serie property determines the explanatory data series.

Comments

The property is relevant if ICurveEstimationExplanatory.IsTrend = False.

Example

To execute the example, add a link to the Stat system assembly.

Sub UserProc;
Var
    trend: SmCurveEstimation;
    d0: Double;
    status, i: Integer;
    ar: Array[25] Of Double;
    Factor: Array[30] Of Double;
Begin
    trend := New SmCurveEstimation.Create;
    ar[00] := 4110; ar[01] := 4280; ar[02] := 4459; ar[03] := 4545; ar[04] := 4664;
    ar[05] := 4861; ar[06] := 5195; ar[07] := 5389; ar[08] := 5463; ar[09] := 5610;
    ar[10] := 5948; ar[11] := 6218; ar[12] := 6521; ar[13] := 6788; ar[14] := 7222;
    ar[15] := 7486; ar[16] := 7832; ar[17] := 8153; ar[18] := 8468; ar[19] := 9054;
    ar[20] := 9499; ar[21] := 9866; ar[22] := 10217; ar[23] := 10763; ar[24] := 10683;
    trend.Explained.Value := ar;
    Factor := New Double[30];
    For i := 0 To Factor.Length - 1 Do
        Factor[i] := 12 * i * i + 3;
    End For;
    trend.Explanatory.IsTrend := False; // explanatory series is set by the user
    trend.Explanatory.Serie.Value := Factor;
    trend.ModelPeriod.LastPoint := 20;
    trend.ForecastLastPoint := 30;
    trend.SeasonalComponent.Mode := SeasonalityType.Additive;
    trend.SeasonalComponent.Cycle := 4;
    status := trend.Execute;
    If status <> 0 Then
        Debug.WriteLine(trend.Errors);
        Else
            For i := 0 To 10 Do
                d0 := trend.DependenceForms.Item(i).CriterionValue;
                Debug.WriteLine(trend.DependenceForms.Item(i).Name + ": " + d0.ToString);
            End For;
    End If;
End Sub UserProc;

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

Linear: 0.987988137462419

Quadratic: 0.99542916076208

Polynomial: 0.996962811420135

Compound: 0.956993803296965

Growth: 0.956993803296965

Logarithmic: 0.716101862160297

Hyperbolic: 0.195983710349197

Exponential: 0.999999998876106

Inverse: 0.167424873636996

Power: 0.999999994509856

Logistic: 0.157635693973965