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Set of rules to allow selection of lows from an input time series.
Attributes
Requirements for definitions of peak selections using gaps to define independence are;
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Input
Timeseries
Options
In the configuration of low selections there are two choices for refining the selection:
- An attribute "lowsBeforeT0totalNumberBeforeT0" must be defined. The value attribute defines the maximum number of lows to consider before T0.
- An attribute "lowsAfterT0totalNumberAfterT0" 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.
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- after T0.
- An attribute "skipJustBeforeT0" indicates how many lows to skip just before T0. (optional)
- An attribute "skipJustAfterT0" indicates how many lows to skip just after T0.
They default to 0.
- (optional)
or
- An attribute "totalNumber" must be defined. The value attribute defines the maximum number of lows to consider.
Output
Timeseries containing the selection of lows
Configuration example
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<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>
<gapLengthInSec>2700<<totalNumberBeforeT0>3</gapLengthInSec>totalNumberBeforeT0>
<lowsBeforeT0>0<<totalNumberAfterT0>4</lowsBeforeT0>totalNumberAfterT0>
<lowsAfterT0>15</lowsAfterT0>
<totalNumberOfLows>0</totalNumberOfLows>
<skipJustBeforeT0>0</<skipJustBeforeT0>2</skipJustBeforeT0>
<skipJustAfterT0>5<<skipJustAfterT0>2</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>
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In this example:
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- Only the last three lows before T0 and the first four lows after T0 are considered.
- The first two lows of the last two three lows just before T0 are skipped, leaving only the third last one.
- Similarly the first two lows just after T0 are skipped, leaving the third and fourth ones.