# EVAL ### Description Evaluates the `buildingSelector` for the given `datasetName` and returns a `GroupedVector`, where: * The **key** is the `customerBuildingId`. * The **value** is a `Vector` containing all event values from the dataset, grouped by `customerBuildingId`. ### EVAL(Text, AttributeOperator) ```java POSITION(datasetName: Text, buildingSelector: AttributeOperator): GroupedVector> ``` #### Parameters
ParameterDescription
datasetNameThe datasetName for which we want to load all events for the buildings specified by the buildingSelector.
buildingSelector

The buildingSelector as AttributeOperator which specifies for which buildings we want to load the events specified by datasetName. Valid values are:

Building::IsSelfSufficiencyMotivated
Building::IsEcologicalMotivated
Building::IsSelfSufficiencyMotivated
Building::IsMultiPerson
Building::IsSinglePerson
Building::IsResidential
Building::IsCommercial
Building::IsInSameCountry
Building::IsInSameConsumptionCategory
Building::All

#### Returns Returns a `GroupedVector` where: * The **key** is the `customerBuildingId`. * The **values** are vectors containing event values, grouped by household as specified in `datasetName`. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://doc.moost.io/platform-manual/rules/rule-language/functions/avg-1.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.