Description
Set of rules to allow selection of minimum values from an input time series.
Input
Timeseries
Options
- An optional attribute "selectNumberOfLowestMin" may be defined. The value attribute defines the number of lowest minimum values which will be written to the output timeseries.
- The periodTransformation may be applied to this transformation (see Configuration example 2 below).
Output
Timeseries containing the selection of minimum values.
Configuration example 1
SelectionMinimumFunctionTest 1.00 default.xml
<transformation id="minimum function test"> <selection> <minimum> <inputVariable> <timeSeriesSet> <moduleInstanceId>SelectionMinimumFunctionTest</moduleInstanceId> <valueType>scalar</valueType> <parameterId>H.tidal</parameterId> <locationId>H-2010</locationId> <timeSeriesType>external historical</timeSeriesType> <timeStep unit="minute" multiplier="15"/> <relativeViewPeriod unit="day" start="0" end="365"/> <readWriteMode>editing visible to all future task runs</readWriteMode> </timeSeriesSet> </inputVariable> <outputVariable> <timeSeriesSet> <moduleInstanceId>SelectionMinimumFunctionTest</moduleInstanceId> <valueType>scalar</valueType> <parameterId>H.updated</parameterId> <locationId>H-2010</locationId> <timeSeriesType>external historical</timeSeriesType> <timeStep unit="nonequidistant"/> <relativeViewPeriod unit="day" start="-5" end="15"/> <readWriteMode>add originals</readWriteMode> </timeSeriesSet> </outputVariable> </minimum> </selection> </transformation>
In this example:
- The lowest minimum value is returned by the output time series.
Configuration example 2
SelectionPeriodMinimumFunctionTest 1.00 default.xml
<transformation id="period minimum function test"> <periodTransformation> <period> <season> <startMonthDay>--04-01</startMonthDay> <endMonthDay>--03-31</endMonthDay> </season> </period> <selection> <minimum> <inputVariable> <timeSeriesSet> <moduleInstanceId>Import</moduleInstanceId> <valueType>scalar</valueType> <parameterId>RH_24H</parameterId> <locationSetId>KNMIDAG</locationSetId> <timeSeriesType>external historical</timeSeriesType> <timeStep unit="day" multiplier="1" /> <relativeViewPeriod unit="day" start="-2924" end="0"/> <readWriteMode>editing visible to all future task runs</readWriteMode> </timeSeriesSet> </inputVariable> <selectNumberOfLowestMin>3</selectNumberOfLowestMin> <outputVariable> <timeSeriesSet> <moduleInstanceId>SelectionPeriodMinimumFunctionTest</moduleInstanceId> <valueType>scalar</valueType> <parameterId>RH_24H.max</parameterId> <locationSetId>KNMIDAG</locationSetId> <timeSeriesType>external historical</timeSeriesType> <timeStep unit="nonequidistant"/> <relativeViewPeriod unit="day" start="-2924" end="0"/> <readWriteMode>editing visible to all future task runs</readWriteMode> </timeSeriesSet> </outputVariable> </minimum> </selection> </periodTransformation> </transformation>
In this example:
- For each hydrologic year, the three lowest minimum values are returned by the output time series.