/*
* 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.visualization;
import java.util.Iterator;
import com.rapidminer.example.Attribute;
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 operators calculates some very simple statistics about the given example
* set. These are the ranges of the attributes and the average or mode values
* for numerical or nominal attributes respectively. These informations are
* automatically calculated and displayed by the graphical user interface of
* RapidMiner. Since they cannot be displayed with the command line version of RapidMiner
* this operator can be used as a workaround in cases where the graphical user
* interface cannot be used.
*
* @author Ingo Mierswa
* @version $Id: DataStatisticsOperator.java,v 1.5 2006/03/21 15:35:42
* ingomierswa Exp $
*/
public class DataStatisticsOperator extends Operator {
/** Creates a new data statistics operator. */
public DataStatisticsOperator(OperatorDescription description) {
super(description);
}
/** Creates and delivers the simple statistics object. */
public IOObject[] apply() throws OperatorException {
ExampleSet eSet = getInput(ExampleSet.class);
eSet.recalculateAllAttributeStatistics();
DataStatistics statistics = new DataStatistics();
Iterator<Attribute> i = eSet.getAttributes().allAttributes();
while (i.hasNext()) {
statistics.addInfo(eSet, i.next());
}
return new IOObject[] { eSet, statistics };
}
/** Requires an example set. */
public Class<?>[] getInputClasses() {
return new Class[] { ExampleSet.class };
}
/** Returns the example set and the statistics. */
public Class<?>[] getOutputClasses() {
return new Class[] { ExampleSet.class, DataStatistics.class };
}
}