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# Statistics Children Locations

You can compute some statistics of the children locations of a parent location. This transformation is available since 2013.01.

For example: you may have a parent location that has some children locations that have all their own discharge. To compute the total sum of all the discharges you can simply use the StatisticsChildrenLocations-sum.
Therefore you define as output location (or locationSet) the parent location(s) and as input locations the children locations.

The possible statistics are:

• count
• kurtosis
• max
• mean
• median
• min
• percentileExceedence (with % value)
• percentileNonExceedence (with % value)
• quartile (with quartile value)
• rootMeanSquareError
• rsquared
• skewness
• standardDeviation
• sum
• variance
```<transformation id="aggregate laterals">
<statisticsChildrenLocations>
<sum>
<inputVariable>
<timeSeriesSet>
<moduleInstanceId>Prep</moduleInstanceId>
<valueType>scalar</valueType>
<parameterId>Q</parameterId>
<locationSetId>laterals</locationSetId>
<timeSeriesType>temporary</timeSeriesType>
<timeStep unit="minute" multiplier="5"/>
<relativeViewPeriod unit="hour" start="-96" end="0" startOverrulable="true"/>
</timeSeriesSet>
</inputVariable>
<outputVariable>
<timeSeriesSet>
<moduleInstanceId>Prep</moduleInstanceId>
<valueType>scalar</valueType>
<parameterId>Q</parameterId>
<locationSetId>parents_of_laterals</locationSetId>
<timeSeriesType>temporary</timeSeriesType>
<timeStep unit="minute" multiplier="5"/>
<relativeViewPeriod unit="hour" start="-96" end="0" startOverrulable="true"/>