IMs2SLSTransform.IsCoefficientsSaved

Syntax

IsCoefficientsSaved(Coord: IMsFormulaTransformCoord): Boolean;

Parameters

Coord. The output variable slice, for which coefficients are checked.

Description

The IsCoefficientsSaved property returns whether model coefficients are saved.

Comments

Available values:

True. Model coefficients are saved
False. Model coefficients are not saved.

Example

Executing the example requires that the repository contains a modeling container with the MODEL_SPACE identifier. A model with the NEW_2SLS identifier created in this container uses the linear regression method (instrumental variables estimation) for calculation.

Add links to the Metabase, Ms system assemblies.

Sub UserProc;
Var
    MB: IMetabase;
    MObj: IMetabaseObject;
    Model: IMsModel;
    Trans: IMsFormulaTransform;
    VarTrans: IMsFormulaTransformVariable;
    Tree: IMsFormulaTransformSlicesTree;
    Slice: IMsFormulaTransformSlice;
    Selector: IMsFormulaTransformSelector;
    Formula: IMsFormula;
    SLS: IMs2SLSTransform;
    Calc: IMsModelCalculation;
    Coord: IMsFormulaTransformCoord;
    Coef: Array Of Double;
    i: Integer;
Begin
    MB := MetabaseClass.Active;
    MObj := MB.ItemByIdNamespace("New_2SLS", MB.ItemById("MODEL_SPACE").Key).Edit;
    Model := MObj As IMsModel;
    Trans := Model.Transform;
    VarTrans := Trans.Outputs.Item(0);
    Tree := VarTrans.SlicesTree(VarTrans);
    Slice := Tree.CreateSlice(1);
    Selector := Model.Transform.CreateSelector;
    Selector.Slice := Slice;
    Formula := Model.Transform.Transform(Selector);
    SLS := Formula.Method As IMs2SLSTransform;
    Calc := Model.CreateCalculation;
    Calc.Period.IdentificationStartDate := DateTime.ComposeDay(1990, 01, 01);
    Calc.Period.IdentificationEndDate := DateTime.ComposeDay(2000, 12, 31);
    Calc.Period.ForecastStartDate := DateTime.ComposeDay(2001, 01, 01);
    Calc.Period.ForecastEndDate := DateTime.ComposeDay(2010, 01, 01);
    Coord := Trans.CreateCoord(VarTrans);
    //Identification of new equation
    SLS.Identify(Calc As IMsMethodCalculation, Coord);
    //Receive the calculated coefficients
    Coef := SLS.Coefficients(Coord);
    //If is not saved - save
    If Not SLS.IsCoefficientsSaved(Coord) Then
    SLS.Coefficients(Coord) := Coef;
    End If;
    //Display to console
    For i := 0 To Coef.Length - 1 Do
    Debug.WriteLine(Coef[i]);
    End For;
    MObj.Save;
End Sub UserProc;

After executing the example, new coefficients of equation are calculated. The coefficient values are saved and displayed in the development environment console window.