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UserSimple
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It is possible to define embedded variables in this transformation. In the expression both embedded variables and variables defined at the start of the transformations configuration file can be used. If an embedded variable and a variable defined at the start of the transformations configuration file have the same variableId, then the embedded variable will be used.
In FEWS 2014.01 a new feature was added to the UserSimple transformation making it possible to embed variables containing a LocationSet. This can be done by creating the element 'inputVariableDefinition' ‘inputVariableDefinition’ where:
- variableId is the identifier of this variable. This variableId must be used in the expression.
- templateVariableId refers to the variable defined at the start of the transformation configuration file. Note that in the example this variable contains a LocationSet.
- locationId is used to define a specific timeseries when the embedded variable (templateVariableId) contains multiple locations.
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When using coefficient set functions (available since build 30246), the value elements can contain tags between "@" signs (e.g. " (NUMBER)") that refer to location attributes that are defined in the locationSets configuration file. The tags are replaced by actual values. These values can be different for different locations and time periods. See 22 Locations and attributes defined in CSV files, Shape-DBF files or external tables for more information.
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<variable> <variableId>X</variableId> <timeSeriesSet> <moduleInstanceId>UserSimpleWithCoefficientSetFunctionsTest</moduleInstanceId> <valueType>scalar</valueType> <parameterId>Q.m</parameterId> <locationId>locationWithAttributes4</locationId> <timeSeriesType>external historical</timeSeriesType> <timeStep unit="day"/> <relativeViewPeriod unit="day" start="0" end="9"/> <readWriteMode>editing visible to all future task runs</readWriteMode> </timeSeriesSet> </variable> <variable> <variableId>Y</variableId> <timeSeriesSet> <moduleInstanceId>UserSimpleWithCoefficientSetFunctionsTest</moduleInstanceId> <valueType>scalar</valueType> <parameterId>Q.tra</parameterId> <locationId>locationWithAttributes4</locationId> <timeSeriesType>external historical</timeSeriesType> <timeStep unit="day"/> <relativeViewPeriod unit="day" start="0" end="9"/> <readWriteMode>add originals</readWriteMode> </timeSeriesSet> </variable> <transformation id="user simple with coefficient set functions test"> <user> <simple> <expression>a*(X^2) + b*X + c</expression> <coefficientSetFunctions> <coefficient id="a" value="<at:var at:name="coef_a" />@coef_a@"/> <coefficient id="b" value="<at:var at:name="coef_b" />@coef_b@"/> <coefficient id="c" value="<at:var at:name="coef_c" />@coef_c@"/> </coefficientSetFunctions> <outputVariable> <variableId>Y</variableId> </outputVariable> </simple> </user> </transformation> |
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