/**
* Copyright (C) 2001-2017 by RapidMiner and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapidminer.com
*
* This program is free software: you can redistribute it and/or modify it under the terms of the
* GNU Affero General Public License as published by the Free Software Foundation, either version 3
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License along with this program.
* If not, see http://www.gnu.org/licenses/.
*/
package com.rapidminer.operator.preprocessing.transformation.aggregation;
import com.rapidminer.example.Attribute;
/**
* This class implements the Least Aggregation function. This will calculate the least value of the
* attribute of the examples within a group.
*
* @author Sebastian Land
*/
public class LeastAggregationFunction extends NominalAggregationFunction {
public static final String FUNCTION_LEAST = "least";
public LeastAggregationFunction(Attribute sourceAttribute, boolean ignoreMissings, boolean countOnlyDisctinct) {
super(sourceAttribute, ignoreMissings, countOnlyDisctinct, FUNCTION_LEAST, FUNCTION_SEPARATOR_OPEN,
FUNCTION_SEPARATOR_CLOSE);
}
public LeastAggregationFunction(Attribute sourceAttribute, boolean ignoreMissings, boolean countOnlyDisctinct,
String functionName, String separatorOpen, String separatorClose) {
super(sourceAttribute, ignoreMissings, countOnlyDisctinct, functionName, separatorOpen, separatorClose);
}
@Override
public Aggregator createAggregator() {
return new LeastAggregator(this);
}
}