Description
Set of rules to allow selection of lows from an input time series.
Attributes
Requirements for definitions of low selections are:
- An attribute "lowsBeforeT0" must be defined. The value attribute defines the maximum number of lows to consider before T0.
- An attribute "lowsAfterT0" must be defined. The value attribute defines the maximum number of lows to consider before T0.
- An attribute "totalNumberOfLows" must be defined. The value must be set to zero.
The following two attributes are optional:
- An attribute "skipJustBeforeT0" indicates how many lows to skip just before T0.
- An attribute "skipJustAfterT0" indicates how many lows to skip just after T0.
They default to 0.
Configuration example
SelectionLowsFunctionTest 1.00 default.xml
<transformation id="lows function test"> <selection> <lows> <inputVariable> <timeSeriesSet> <moduleInstanceId>SelectionLowsFunctionTest</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> <lowsBeforeT0>0</lowsBeforeT0> <lowsAfterT0>15</lowsAfterT0> <totalNumberOfLows>0</totalNumberOfLows> <skipJustBeforeT0>0</skipJustBeforeT0> <skipJustAfterT0>5</skipJustAfterT0> <outputVariable> <timeSeriesSet> <moduleInstanceId>SelectionLowsFunctionTest</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> </lows> </selection> </transformation>
In this example:
- The time between two local minima (lows) should be at least 2700 seconds or 45 minutes.
- Only the last three lows before T0 and the first four lows after T0 are considered.
- The last two lows just before T0 are skipped, leaving only the third last one.
- Similarly the first lows just after T0 are skipped, leaving the third and fourth ones.