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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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* IndividualInstances.java
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* Copyright (C) 2003 Peter A. Flach, Nicolas Lachiche
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* Thanks to Amelie Deltour for porting the original C code to Java
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* and integrating it into Weka.
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package weka.associations.tertius;
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import weka.core.Attribute;
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import weka.core.Instance;
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import weka.core.Instances;
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import java.util.Enumeration;
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* @author Peter A. Flach
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* @author Nicolas Lachiche
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* @version $Revision: 1.5 $
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public class IndividualInstances extends Instances {
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/** for serialization */
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private static final long serialVersionUID = -7355054814895636733L;
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public IndividualInstances(Instances individuals, Instances parts)
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super(individuals, individuals.numInstances());
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Attribute individualIdentifier = attribute("id");
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if (individualIdentifier == null) {
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throw new Exception("No identifier found in individuals dataset.");
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Attribute partIdentifier = parts.attribute("id");
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if (partIdentifier == null) {
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throw new Exception("No identifier found in parts dataset.");
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Enumeration enumIndividuals = individuals.enumerateInstances();
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while (enumIndividuals.hasMoreElements()) {
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Instance individual = (Instance) enumIndividuals.nextElement();
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Instances partsOfIndividual = new Instances(parts, 0);
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Enumeration enumParts = parts.enumerateInstances();
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while (enumParts.hasMoreElements()) {
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Instance part = (Instance) enumParts.nextElement();
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if (individual.value(individualIdentifier)
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== part.value(partIdentifier)) {
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partsOfIndividual.add(part);
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add(new IndividualInstance(individual, partsOfIndividual));