Trunc(Input: Variant; Precision: Variant): Variant;
Input. Variable.
Precision. The number of decimal places, to which the number must be truncated:
If Precision is greater than 0, the number is rounded to the specified number of decimal places after a decimal point.
If Precision is equal to 0, the number is rounded to the nearest integer.
If Precision is less than 0, the number is rounded to the left of the decimal point.
The Trunc method truncates variable points to the specified number of decimal places.
Executing the example requires that the repository contains a modeling container with the MS identifier. A model with the MODEL_D identifier calculated by the method of determinate equation and containing at least one input variable must be available in this container.
Sub UserProc;
Var
Mb: IMetabase;
ModelSpace, ModelObj: IMetabaseObject;
Transf: IMsFormulaTransform;
Formula: IMsFormula;
Model: IMsModel;
Determ: IMsDeterministicTransform;
TransVar: IMsFormulaTransformVariable;
Slice: IMsFormulaTransformSlice;
TermInfo: IMsFormulaTermInfo;
Expr: IExpression;
Begin
Mb := MetabaseClass.Active;
ModelSpace := Mb.ItemById("MS").Bind;
ModelObj := Mb.ItemByIdNamespace("MODEL_D", ModelSpace.Key).Edit;
Model := ModelObj As IMsModel;
Transf := Model.Transform;
Formula := Transf.FormulaItem(0);
Determ := Formula.Method As IMsDeterministicTransform;
TransVar := Transf.Inputs.Item(0);
Slice := TransVar.Slices.Item(0);
TermInfo := Transf.CreateTermInfo;
TermInfo.Slice := Slice;
TermInfo.Type := MsFormulaTermType.Pointwise;
Expr := Determ.Expression;
Expr.References := "Ms";
Expr.AsString := "Trunc(" + TermInfo.TermInnerText + ", 2)";
If Expr.Valid
Then ModelObj.Save;
Else Debug.WriteLine(The model is not saved: error in the formula);
End If;
End Sub UserProc;
After executing the example the model truncates the first input variable points to two decimal places.
Expression 1:
Trunc({Brazil|BCA},2)
Result: Brazil|BCA factor observations are truncated to two decimal places.
Use: it can be used in formulas of calculated series of time series database and model formulas of modeling container that is a child of the time series database.
Expression 2:
Trunc(X1,0)
Result: X1 factor points are truncated to nearest integer.
Use: it can be used in model formulas of modeling container.
Expression 3:
Trunc(5.978,1)
Result: 5,9.
Use: it can be used in formulas of calculated series of time series database and modeling container models.
See also: