IMsFormulaTermInfo.Lag

Syntax

Lag: String;

Description

The Lag property determines the lag value for the term. The lag indicates the shift of element index, the value of which is used during the calculation in this point. By default, the value 0 is set for property, at that the value of current element is used.

Example

Executing the example requires that the repository contains a modeling container with the KONT_MODEL identifier. The container contains the Var_1 variable, further used as a output variable, and also the Var_Factor variable, used as a factor.

Sub Main;

Var

MB: IMetabase;

Kont: IMetabaseObjectDescriptor;

CrInf: IMetabaseObjectCreateInfo;

MObj: IMetabaseObject;

Model: IMsModel;

Trans: IMsFormulaTransform;

VarTrans: IMsFormulaTransformVariable;

Tree: IMsFormulaTransformSlicesTree;

Slice: IMsFormulaTransformSlice;

Selector: IMsFormulaTransformSelector;

Formula: IMsFormula;

NonLinear: IMsNonLinearRegressionTransform;

Varr: IVariableStub;

TransVar: IMsFormulaTransformVariable;

TermX1: IMsFormulaTerm;

TermX1Info: IMsFormulaTermInfo;

Begin

MB := MetabaseClass.Active;

Kont := Mb.ItemById("KONT_MODEL");

//create a model

CrInf := Mb.CreateCreateInfo;

CrInf.ClassId := MetabaseObjectClass.KE_CLASS_MSMODEL;

CrInf.Id := "New_NonLinReg";

CrInf.Name := "New_NonLinReg";

CrInf.Parent := Kont;

MObj := Mb.CreateObject(CrInf).Edit;

Model := MObj As IMsModel;

Trans := Model.Transform;

// add output variable

Varr := MB.ItemByIdNamespace("Var_1", Kont.Key).Bind As IVariableStub;

Trans.Outputs.Add(Varr);

VarTrans := Trans.Outputs.Item(0);

Tree := VarTrans.SlicesTree(VarTrans);

Slice := Tree.CreateSlice(1);

Selector := Trans.CreateSelector;

Selector.Slice := Slice;

Formula := Trans.Transform(Selector);

Formula.Kind := MsFormulaKind.NonLinearRegression;

Formula.Level := DimCalendarLevel.Year;

NonLinear := Formula.Method As IMsNonLinearRegressionTransform;

//adding a factor

Varr := MB.ItemByIdNamespace("Var_Factor", Kont.Key).Bind As IVariableStub;

Trans.Inputs.Add(Varr);

TransVar := Trans.Inputs.Item(0);

Slice := TransVar.SlicesTree(VarTrans).CreateSlice(1);

//comparison of term to the slice in the variable

TermX1 := NonLinear.Operands.Add(Slice);

TermX1Info := TermX1.TermInfo;

//changing parameters of the first term

TermX1Info.Inversion := MsInversion.DLog;

TermX1Info.InversionLag := MsInversionLag.PrecidingYear;

TermX1Info.Lag := "-1";

TermX1.TermInfo := TermX1Info;

//creation of the equation

NonLinear.Expression.AsString := "A0+" + TermX1Info.TermInnerText + "/10";

MObj.Save;

End Sub Main;

After executing the example, a new model is created in the modeling container. The output variable and one input variable is added into the model. For making the equation the term, that refers to the slice of input variable, is created. The way of initial transformation of data and lag is changed for the term. The method of non-linear regression is used for model calculation.