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if(m > b, 3, if(m > a, 2, 1)) |
Coefficient set or coefficient set functions
Should contain the coefficients that are used in the free format expression. Defined Define the ids and values of the coefficients here, then reference refer to the ids of these coefficients in the expression. Make sure that for all the coefficient ids in the free format expression the values are defined here.
When using coefficient set functions, the value elements can contain tags between "@" signs (e.g. "") 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 Shape-DBF files for more information.
Output
- output: result of the evaluated expression.
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The example below uses an if statement. Below Here 'X' is a reference to a variable and 'a' is a reference to a coefficient.
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<variable>
<variableId>X</variableId>
<timeSeriesSet>
<moduleInstanceId>UserSimpleWithIfElseStatementTest</moduleInstanceId>
<valueType>scalar</valueType>
<parameterId>Q.m</parameterId>
<locationId>H-2001</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>UserSimpleWithIfElseStatementTest</moduleInstanceId>
<valueType>scalar</valueType>
<parameterId>Q.tra</parameterId>
<locationId>H-2001</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 if else statement test">
<user>
<simple>
<!-- if X > 3, then the expression part if(X > 3, 10.5, -2) is replaced with 10.5 -->
<!-- if X <= 3, then the expression part if(X > 3, 10.5, -2) is replaced with -2 -->
<expression>if(X > 3, 10.5, -2) + 5*a</expression>
<coefficientSet>
<coefficient id="a" value="1.5"/>
</coefficientSet>
<outputVariable>
<variableId>Y</variableId>
</outputVariable>
</simple>
</user>
</transformation>
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The example below uses coefficientSetFunctions (available since build 30246). Here 'X' is a reference to a variable and 'a', 'b' and 'c' are references to coefficients. Here the coefficients are defined in coefficientSetFunctions, where , and refer to location number attributes that are defined in the locationSets configuration file.
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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" />"/>
<coefficient id="b" value="<at:var at:name="coef_b" />"/>
<coefficient id="c" value="<at:var at:name="coef_c" />"/>
</coefficientSetFunctions>
<outputVariable>
<variableId>Y</variableId>
</outputVariable>
</simple>
</user>
</transformation>
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