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// Copyright 2017 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.grouping.request;
/**
* This class represents an stddev-aggregator in a {@link GroupingExpression}. It evaluates to population standard deviation
* of the values that the contained expression evaluated to over all the inputs.
*
* @author bjorncs
*/
public class StandardDeviationAggregator extends AggregatorNode {
/**
* @param exp The expression to aggregate on.
*/
public StandardDeviationAggregator(GroupingExpression exp) {
super("stddev", exp);
}
}
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