| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| package org.apache.samoa.moa.classifiers; |
| |
| import org.apache.samoa.instances.Instance; |
| import org.apache.samoa.moa.core.Example; |
| import org.apache.samoa.moa.learners.Learner; |
| |
| /** |
| * Classifier interface for incremental classification models. |
| * |
| * @author Richard Kirkby (rkirkby@cs.waikato.ac.nz) |
| * @version $Revision: 7 $ |
| */ |
| public interface Classifier extends Learner<Example<Instance>> { |
| |
| /** |
| * Gets the classifiers of this ensemble. Returns null if this learner is a single learner. |
| * |
| * @return an array of the learners of the ensemble |
| */ |
| public Classifier[] getSubClassifiers(); |
| |
| /** |
| * Produces a copy of this learner. |
| * |
| * @return the copy of this learner |
| */ |
| public Classifier copy(); |
| |
| /** |
| * Gets whether this classifier correctly classifies an instance. Uses getVotesForInstance to obtain the prediction |
| * and the instance to obtain its true class. |
| * |
| * |
| * @param inst |
| * the instance to be classified |
| * @return true if the instance is correctly classified |
| */ |
| public boolean correctlyClassifies(Instance inst); |
| |
| /** |
| * Trains this learner incrementally using the given example. |
| * |
| * @param inst |
| * the instance to be used for training |
| */ |
| public void trainOnInstance(Instance inst); |
| |
| /** |
| * Predicts the class memberships for a given instance. If an instance is unclassified, the returned array elements |
| * must be all zero. |
| * |
| * @param inst |
| * the instance to be classified |
| * @return an array containing the estimated membership probabilities of the test instance in each class |
| */ |
| public double[] getVotesForInstance(Instance inst); |
| } |