/*
* RapidMiner
*
* Copyright (C) 2001-2008 by Rapid-I and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapid-i.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.filter;
import com.rapidminer.example.Attribute;
import com.rapidminer.example.Example;
import com.rapidminer.example.ExampleSet;
import com.rapidminer.operator.IOObject;
import com.rapidminer.operator.Operator;
import com.rapidminer.operator.OperatorDescription;
import com.rapidminer.operator.OperatorException;
/**
* This operator simply replaces all values by its absolute values.
*
* @author Ingo Mierswa
* @version $Id: AbsoluteValueFilter.java,v 1.1 2008/08/28 18:54:02 ingomierswa Exp $
*/
public class AbsoluteValueFilter extends Operator {
public AbsoluteValueFilter(OperatorDescription description) {
super(description);
}
@Override
public IOObject[] apply() throws OperatorException {
ExampleSet exampleSet = getInput(ExampleSet.class);
for (Example example : exampleSet) {
for (Attribute attribute : exampleSet.getAttributes()) {
if (attribute.isNumerical()) {
double value = example.getValue(attribute);
value = Math.abs(value);
example.setValue(attribute, value);
}
}
}
return new IOObject[] { exampleSet };
}
@Override
public Class<?>[] getInputClasses() {
return new Class[] { ExampleSet.class };
}
@Override
public Class<?>[] getOutputClasses() {
return new Class[] { ExampleSet.class };
}
}