IModelling.ExpX

Syntax

ExpX(Input: Variant; Base: Variant): Variant;

Parameters

Input. Power exponent.

Base. Variable that sets the base of power.

Description

The ExpX method returns the result of raising points variable points to the specified power.

Comments

The ExpX and IModelling.Power methods duplicate each.

Example

Executing the example requires that the repository contains a modeling container with the MS identifier. This container includes a model with the MODEL_D identifier that is calculated by the determinate equation method and contains more than one input variable.

Add links to the Metabase and Ms system assemblies.

Sub UserProc;
Var
    Mb: IMetabase;
    ModelSpace, ModelObj: IMetabaseObject;
    Transf: IMsFormulaTransform;
    Formula: IMsFormula;
    Model: IMsModel;
    Determ: IMsDeterministicTransform;
    TransVar: IMsFormulaTransformVariable;
    Slice: IMsFormulaTransformSlice;
    TermInfo: IMsFormulaTermInfo;
    Inp_1, Inp_2: String;
    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;
    Inp_1 := TermInfo.TermInnerText;
    TransVar := Transf.Inputs.Item(1);
    Slice := TransVar.Slices.Item(0);
    TermInfo := Transf.CreateTermInfo;
    TermInfo.Slice := Slice;
    TermInfo.Type := MsFormulaTermType.Pointwise;
    Inp_2 := TermInfo.TermInnerText;
    Expr := Determ.Expression;
    Expr.References := "Ms";
    Expr.AsString := "ExpX(" + Inp_2 + "," + Inp_1 + ")";
    If Expr.Valid
        Then ModelObj.Save;
        Else Debug.WriteLine(Model is not saved: error in formula);
    End If;
End Sub UserProc;

After executing the example the model raises points of the first input variable to the power specified by points of the second input variable.

Example of Use in Expressions

Expression 1:

ExpX({Canada|BCA},{Brazil|BCA})

Result: Brazil|BCA factor observations are raised to the power that is set by the observations of the Canada|BCA factor.

Use: it can be used in formulas of cross functional expression editor in any platform tool where it is available.

Expression 2:

ExpX(2,X1)

Result: all X1 factor points are raised to the second power.

Use: it can be used in model formulas of modeling container.

Expression 3:

ExpX(4,2)

Result: 24=16.

Application: it can be used in any expressions.