IMsCompositeFormulaTermList.Add

Syntax

Description

The Add method creates a composite term.

Example

Executing the example requires that the repository contains a modeling container with the KONT_MODEL identifier.

Add links to the Metabase and Ms system assemblies.

Sub UserProc;
Var
    MB: IMetabase;
    CrInf: IMetabaseObjectCreateInfo;
    MObj: IMetabaseObject;
    Model: IMsModel;
    Trans: IMsFormulaTransform;
    VarTrans: IMsFormulaTransformVariable;
    Tree: IMsFormulaTransformSlicesTree;
    Slice: IMsFormulaTransformSlice;
    Selector: IMsFormulaTransformSelector;
    Formula: IMsFormula;
    LinReg: IMsLinearRegressionTransform;
    Varr: IMsVariable;
    TransVar: IMsFormulaTransformVariable;
    ComposForm: IMsCompositeFormulaTermList;
    ComposTerm: IMsCompositeFormulaTerm;
    TermX1, TermX2: IMsFormulaTerm;
Begin
    MB := MetabaseClass.Active;
    //create a model
    CrInf := Mb.CreateCreateInfo;
    CrInf.ClassId := MetabaseObjectClass.KE_CLASS_MSMODEL;
    CrInf.Id := "New_LinReg";
    CrInf.Name := "New_LinReg";
    CrInf.Parent := Mb.ItemById("KONT_MODEL");
    CrInf.Permanent := False;
    MObj := Mb.CreateObject(CrInf).Edit;
    Model := MObj As IMsModel;
    Trans := Model.Transform;
    //add output variable
    Varr := MB.ItemByIdNamespace("Var_1",MB.ItemById("KONT_MODEL").Key).Bind As IMsVariable;
    Model.Output.Add(Varr);
    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);
    Formula.Kind := MsFormulaKind.LinearRegression;
    LinReg := Formula.Method As IMsLinearRegressionTransform;
    //add a factor
    Varr := MB.ItemByIdNamespace("Var_Factor",MB.ItemById("KONT_MODEL").Key).Bind As IMsVariable;
    Model.Input.Add(Varr);
    TransVar := Model.Transform.Inputs.Item(0);
    ComposForm := LinReg.Explanatories;
    ComposTerm := ComposForm.Add;
    Slice := TransVar.SlicesTree(Null).CreateSlice(1);
    TermX1 := ComposTerm.Operands.Add(Slice);
    Slice := TransVar.SlicesTree(Null).CreateSlice(2);
    TermX2 := ComposTerm.Operands.Add(Slice);
    ComposTerm.Expression.AsString:= Trans.SliceToTerm(TermX1.Slice, TermX1.Lag.AsString) + "/"+ Trans.SliceToTerm(TermX2.Slice, TermX2.Lag.AsString);
    MObj.Save;
End Sub;

After executing the example, a new model is created in the modeling container. The output variable and one factor are added to the created model. A composite term that contains two terms, referring to slices of the first input variable, is created for the model equation. The linear regression method is used for model calculation.