| package com.yahoo.labs.samoa.moa.classifiers.core.attributeclassobservers; |
| |
| /* |
| * #%L |
| * SAMOA |
| * %% |
| * Copyright (C) 2007 University of Waikato, Hamilton, New Zealand |
| * %% |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * #L% |
| */ |
| |
| import com.yahoo.labs.samoa.moa.classifiers.core.AttributeSplitSuggestion; |
| import com.yahoo.labs.samoa.moa.classifiers.core.splitcriteria.SplitCriterion; |
| import com.yahoo.labs.samoa.moa.core.ObjectRepository; |
| import com.yahoo.labs.samoa.moa.options.AbstractOptionHandler; |
| import com.yahoo.labs.samoa.moa.tasks.TaskMonitor; |
| |
| /** |
| * Class for observing the class data distribution for a null attribute. |
| * This method is used to disable the observation for an attribute. |
| * Used in decision trees to monitor data statistics on leaves. |
| * |
| * @author Richard Kirkby (rkirkby@cs.waikato.ac.nz) |
| * @version $Revision: 7 $ |
| */ |
| public class NullAttributeClassObserver extends AbstractOptionHandler implements AttributeClassObserver { |
| |
| private static final long serialVersionUID = 1L; |
| |
| @Override |
| public void observeAttributeClass(double attVal, int classVal, double weight) { |
| } |
| |
| @Override |
| public double probabilityOfAttributeValueGivenClass(double attVal, |
| int classVal) { |
| return 0.0; |
| } |
| |
| public double totalWeightOfClassObservations() { |
| return 0.0; |
| } |
| |
| public double weightOfObservedMissingValues() { |
| return 0.0; |
| } |
| |
| @Override |
| public void getDescription(StringBuilder sb, int indent) { |
| // TODO Auto-generated method stub |
| } |
| |
| @Override |
| public AttributeSplitSuggestion getBestEvaluatedSplitSuggestion( |
| SplitCriterion criterion, double[] preSplitDist, int attIndex, |
| boolean binaryOnly) { |
| return null; |
| } |
| |
| @Override |
| protected void prepareForUseImpl(TaskMonitor monitor, ObjectRepository repository) { |
| // TODO Auto-generated method stub |
| } |
| |
| @Override |
| public void observeAttributeTarget(double attVal, double target) { |
| throw new UnsupportedOperationException("Not supported yet."); |
| } |
| } |