Ms > Ms Assembly Interfaces > IMsLinearRegressionTransform > IMsLinearRegressionTransform.Coefficients
Coefficients(Coord: IMsFormulaTransformCoord): Array;
Coord. The output variable slice for which calculation is performed.
The Coefficients property determines an array of values of model equation coefficients. If a constant is present in the equation, its value is specified in the last element of the array. To save the coefficients, assign an array of values to this property; to flush the coefficients, assign the Null value.
Executing the example requires that the modeling container includes the model that uses the method of linear regression for calculation.
Sub UserProc;
Var
MB: IMetabase;
MObj: IMetabaseObject;
Model: IMsModel;
Trans: IMsFormulaTransform;
VarTrans: IMsFormulaTransformVariable;
Tree: IMsFormulaTransformSlicesTree;
Slice: IMsFormulaTransformSlice;
Selector: IMsFormulaTransformSelector;
Formula: IMsFormula;
Linear: IMsLinearRegressionTransform;
Calc: IMsModelCalculation;
Coord: IMsFormulaTransformCoord;
Coef: Array Of Double;
Ar: Array[0..1] Of Integer;
i: Integer;
Begin
MB := MetabaseClass.Active;
MObj := MB.ItemByIdNamespace("New_LinReg", MB.ItemById("KONT_MODEL").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);
Linear := Formula.Method As IMsLinearRegressionTransform;
Ar[0] := 2;
Ar[1] := 3;
Linear.AutoRegressionOrder := Ar;
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, 12, 31);
Coord := Trans.CreateCoord(VarTrans);
//identification of new equation
Linear.Identify(Calc As IMsMethodCalculation, Coord);
//get calculated coefficients
Coef := Linear.Coefficients(Coord);
//if not saved, then save
If Not Linear.IsCoefficientsSaved(Coord) Then
Linear.Coefficients(Coord) := Coef;
End If;
//display in the console
For i := 0 To Coef.Length - 1 Do
Debug.WriteLine(Coef[i]);
End For;
MObj.Save;
End Sub UserProc;
After executing the example the model parameters are modified and new equation coefficients are calculated. Unsaved coefficient values are saved and displayed in the console window.
See also:
