com.yahoo.search.grouping.request

Class StandardDeviationAggregator

java.lang.Object

com.yahoo.search.grouping.request.GroupingNode

com.yahoo.search.grouping.request.GroupingExpression

com.yahoo.search.grouping.request.AggregatorNode

com.yahoo.search.grouping.request.StandardDeviationAggregator

public class StandardDeviationAggregator
extends AggregatorNode

This class represents an stddev-aggregator in a GroupingExpression. It evaluates to population standard deviation of the values that the contained expression evaluated to over all the inputs.

Author:

bjorncs

Constructor Summary

Constructors

Constructor and Description
StandardDeviationAggregator(GroupingExpression exp)

Method Summary

Methods inherited from class com.yahoo.search.grouping.request.AggregatorNode

getExpression, resolveLevel, visit

Methods inherited from class com.yahoo.search.grouping.request.GroupingExpression

asImage, asString, getLevel, setLabel

Methods inherited from class com.yahoo.search.grouping.request.GroupingNode

getLabel, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

StandardDeviationAggregator

public StandardDeviationAggregator(GroupingExpression exp)

Parameters:

exp - The expression to aggregate on.