AverageI(Parameters: Array): Variant;
AverageI(Context: Prognoz.Platform.Interop.Fore.ForeRuntimeContext; Parameters: System.Array): object;
Context. Context. The parameter is used only in Fore.NET.
Parameters. Variable.
The AverageI method returns the average of selected variable points if this variable contains only integer values.
If more than one variable is specified in Parameters, the average of corresponding variable points is calculated. For example, the average of points of 2018 by all variables.
Variables in Parameters must be separated via comma.
A calculated period can be set for the method. To do this, use the IModelling.SetPeriod method, by specifying it at any place of input array.
To calculate the method without taking into account empty values, use the IgnoreMissing parameter by specifying it in any place of the input array. Available values of the parameter:
True. Default value. Calculation does not take into account empty values.
False. Calculation takes into account empty values.
Use the IModelling.Average method to calculate average of points of the variable containing not only integer values.
Executing the example requires that the repository contains a modeling container with the MS identifier. This contains includes a model with the MODEL_D identifier that is calculated by the determinate equation method and contains more than one input variable.
The first input variable must contain only integer values.
Add links to the Metabase, Ms system assemblies.
Sub UserAverageI;
Var
Mb: IMetabase;
ModelSpace, ModelObj: IMetabaseObject;
Transf: IMsFormulaTransform;
Formula: IMsFormula;
Model: IMsModel;
Determ: IMsDeterministicTransform;
TransVar: IMsFormulaTerm;
Inp_1: String;
Expr: IExpression;
Begin
Mb := MetabaseClass.Active;
// Get model
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;
// Get the first input variable
TransVar := Determ.Operands.Item(0);
Inp_1 := TransVar.TermToInnerText;
// Get the second input variable
TransVar := Determ.Operands.Item(1);
// Set calculation formula
Expr := Determ.Expression;
Expr.References := "Ms";
Expr.AsString := TransVar.TermToInnerText + "+AverageI(" + Inp_1 + ")";
If Expr.Valid
Then ModelObj.Save;
Else Debug.WriteLine("The model is not saved: error in formula");
End If;
End Sub UserAverageI;
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: IMsFormulaTerm;
Inp_1: String;
Expr: IExpression;
Begin
Mb := Params.Metabase;
// Get the model
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;
// Get the first input variable
TransVar := Determ.Operands.Item[0];
Inp_1 := TransVar.TermToInnerText();
// Get the second input variable
TransVar := Determ.Operands.Item[1];
// Set calculation formula
Expr := Determ.Expression;
Expr.References := "Ms";
Expr.AsString := TransVar.TermToInnerText() + "+AverageI(" + Inp_1 + ")";
If Expr.Valid
Then ModelObj.Save();
Else System.Diagnostics.Debug.WriteLine("Model is not saved: error in formulaquot;);
End If;
End Sub;
After executing the example the model calculates values of the second input variable increased by the average of the first input variable.
Expression 1:
AverageI({Brazil|BCA},False)
Result: the average of observations of the Brazil|BCA series is calculated taking into account empty values. If the series contains real values, an error occurs.
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:
AverageI(X1, SetPeriod(2000,2010))
Result: the average of points of the X1 factor is calculated from 2000 to 2010.
Use: it can be used in model variable-based formulas of modeling container.
Expression 3:
AverageI(1, 2, 1, 7)
Result: 3.
Application: it can be used in any expressions.
See also:
IModelling | Time Series Database: Calculator | Modeling container: Editing Regressor or Formula