IModelling.Max

Fore Syntax

Max(Inputs: Array): Variant;

Fore.NET Syntax

Max(Context: Prognoz.Platform.Interop.Fore.ForeRuntimeContext; Inputs: System.Array): object;

Parameters

Context. Context. The parameter is used only in Fore.NET.

Inputs. Variable.

Description

The Max method returns maximum value of variable points.

Comments

The method provides a possibility to set calculation period. To do this, use the IModelling.SetPeriod method, by specifying it at any place of input array.

Fore 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 method of determinate equation and containing more than one input variable.

Add links to the Metabase, 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: 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.Serie;
    Inp_1 := TermInfo.TermInnerText;
    TransVar := Transf.Inputs.Item(
1);
    Slice := TransVar.Slices.Item(
0);
    TermInfo := Transf.CreateTermInfo;
    TermInfo.Slice := Slice;
    TermInfo.Type := MsFormulaTermType.Pointwise;
    Expr := Determ.Expression;
    Expr.References := 
"Ms";
    Expr.AsString := TermInfo.TermInnerText + 
"+Max(" + Inp_1 + ")";
    
If Expr.Valid
        
Then ModelObj.Save;
        
Else Debug.WriteLine("The model is not saved: error in formula");
    
End If;
End Sub UserProc;

After executing the example, the model calculates values of the second input variable increased by maximum value of the first input variable.

Fore.NET Example

Imports Prognoz.Platform.Interop.ForeSystem;
Imports Prognoz.Platform.Interop.Ms;

Public Shared Sub Main(Params: StartParams);
Var
    Mb: IMetabase;
    ModelSpace, ModelObj: IMetabaseObject;
    Transf: IMsFormulaTransform;
    Formula: IMsFormula;
    Model: IMsModel;
    Determ: IMsDeterministicTransform;
    TransVar: IMsFormulaTransformVariable;
    Slice: IMsFormulaTransformSlice;
    TermInfo: IMsFormulaTermInfo;
    Inp_1: String;
    Expr: IExpression;
Begin
    Mb := Params.Metabase;
    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.mfttSerie;
    Inp_1 := TermInfo.TermInnerText;
    TransVar := Transf.Inputs.Item[1];
    Slice := TransVar.Slices.Item[0];
    TermInfo := Transf.CreateTermInfo();
    TermInfo.Slice := Slice;
    TermInfo.Type := MsFormulaTermType.mfttPointwise;
    Expr := Determ.Expression;
    Expr.References := "Ms";
    Expr.AsString := TermInfo.TermInnerText + "+Max(" + Inp_1 + ")";
    If Expr.Valid
        Then ModelObj.Save();
        Else System.Diagnostics.Debug.WriteLine("Model is not saved: error in formula");
    End If;
End Sub;

Example of Use in Expressions

Expression 1:

Max({Brazil|BCA})

Result: maximum value of the Brazil|BCA series observation.

Use: it can be used in formulas of calculated series of time series database and in formulas of attribute-based models of modeling container.

Expression 2:

Max(X1, SetPeriod(2000,2010))

Result: maximum value of the X1 factor point valuefor the period from 2000 to 2010.

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

Expression 3:

Max(1, 2, 3, 4)

Result: 4.

Use: it can be used in formulas of calculated series of time series database and modeling container models.

See also:

IModelling | Time Series Database: Calculator | Modeling Container: Editing Regressor or Formula