Metamodel Parameters: Desktop Application

Parameters enable the user to manage metamodel calculation. It can also be used in factor calculation formulas, in model calculation formulas, on setting up advanced filtering of dimensions, and so on.

TIP. To change parameter value of a particular model, use the View Results panel. Parameter values that are set on this panel are not saved. They are used to calculate a model without calculating the entire metamodel chain.

To add a parameter, click the Add button, to edit the selected parameter, click the Edit button or use the panel context menu items with the same name. The Edit Parameter dialog box opens where determine the required parameter settings.

To delete the selected parameter, click the Delete button or select the similar context menu item of the panel.

NOTE. After the parameter is removed deleted from metamodel, delete it from all places where it was used. For example, from calculation equations of factors, and so on.

Editing Parameter

By default, the parameter is created without specifying a type. It is enough to determine parameter name and identifier in the corresponding boxes:

After parameter type is selected, an additional box appears to set the default parameter value.

The default value determines parameter data type. For example, if any number is specified, the parameter type is numeric, and if it is string, the parameter is string.

Use

To use the parameter in model or factor calculation formulas, determine parameter name in figured brackets and add the operation transforming to the required data type:

Integer number. as integer;
Real number. as double;
String. as string.

Example

For example, there is a parameter named Adjustment with the default value 0.69 and there is a model included to the metamodel calculation chain containing the parameter. The model contains the Population, mln. people|Anchorage factor. The formula example for this factor using the parameter:

{Population, mln. people|Anchorage[t]} + ({Adjustment} as double)

As a result, the factor value in each point will be increased to the parameter value.

A time series is used as a parameter value. The default value is absent.

Use

It is allowed to use the parameter of this type in model or factor calculation formulas, if operation or method can have one or several data series, for example, comparison operations or methods searching greatest, least values and the like.

Example

For example, there is a parameter named Average Values and there is a model included into metamodel calculation chain with this parameter. The model contains the Population, mln. people|Anchorage factor. The formula example for this factor using the parameter:

Max({Population, mln. people|Anchorage[t]},{Average values})

As a result, each factor point will contain maximum value from corresponding points of the Population, mln. people|Anchorage series and from the series sent in the parameter.

A specific date is used as a parameter value.

Use

It is allowed to use parameter of this type in model or factor calculation formulas, if operation or method can have one or several dates, for example, the method generating the period and the like.

Example

For example, there are parameters named Start Date and End Date and there is a model included in the metamodel calculation chain containing this parameter. The model contains the Population, mln. people|Anchorage factor. The example of formula for model using the parameter:

Max({Population, mln. people|Anchorage[t]},SetPeriod({Start date},{End date}))

As a result, the model will contain maximum value from the period set by the Start Date and End Date parameters.

A period between two specific dates is used as a parameter value.

Use

It is allowed to use a parameter of this type in model or factor calculation models, if operation or method can have a period, for example, forecasting methods and the like.

Example

For example, there is a parameter named Calculation Period and there is a model included into metamodel calculation chain containing this parameter. The model contains the Population, mln. people|Anchorage factor. The example of formula for model using the parameter:

arima({Population, mln. people|Anchorage[t]}, {Calculation period}, "1", "", 0, estimate)

As a result, the model will be calculated by the Arima method for the period determined by the parameter.

The selection of the specified dictionary is used as a parameter value.

Use

A parameter of this type can be used to set attribute values of output and input model variables or variables attribute values.

It is allowed to use a parameter of this type in model or factor calculation formulas, if the parameter sets value of a factor attribute as follows: {[<Factor attribute name>]|{<Parameter name>}|[<Factor attribute name>]}. For example:

{{Factor}|Anchorage}

{Anchorage|{Factor}|A]}

It is also allowed to use selection by the selected attribute. To do this, in the factor or model calculation formula determine attribute name as follows: {<Parameter name>.<Attribute name>}. For example:

{Country.Partner}

It is also allowed to use attributes from linked dictionaries as follows: {<Parameter name>.<Linked dictionary attribute name>. … .<Linked dictionary attribute name>}. For example:

{Country.Partner.Name}

It is allowed to use a parameter of this type in model or factor calculation formulas, if operation or method can have a series, for example, foresting methods and the like.

Example

For example, there is a parameter named Indicator and there is a model included into the metamodel calculation chain containing this parameter. A time series database, which attribute is based on the dictionary specified in the default value for the Indicator parameter, is used as a data source for model factors.

arima({{Indicator}|Anchorage[t]}, SetPeriod("2001", "2016"), "1", "", 0, estimate)

As a result, the model will be calculated by the Arima method on the output variable, which attribute is set by the parameter.

The specified frequency is used as a parameter value.

Use

It is allowed to use a parameter of this type in model or factor calculation models, if it is possible to determine calculation frequency in the operation or method, for example, aggregation methods and the like.

Example

For example, there is a parameter named Frequency and there is a model included into the metamodel calculation chain containing this parameter. The model contains the Population, mln. people|Anchorage factor. The example of formula for model using the parameter:

collapse({Population, mln. people|Anchorage[t]}, MsCollapseType.Average, {Frequency})

As a result, the model will be calculated by the Collapse method on the frequency determined by parameter.

An alternative hierarchy key is used as a parameter value.

Use

In the matrix aggregation model on setting up dimension filtering.

As a result, matrix aggregation is calculated by elements of alternative hierarchy with the specified key.