Package org.neuroph.nnet

Source Code of org.neuroph.nnet.Outstar

/**
* Copyright 2010 Neuroph Project http://neuroph.sourceforge.net
*
* 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.
*/

package org.neuroph.nnet;

import org.neuroph.core.Layer;
import org.neuroph.core.NeuralNetwork;
import org.neuroph.nnet.learning.OutstarLearning;
import org.neuroph.util.ConnectionFactory;
import org.neuroph.util.LayerFactory;
import org.neuroph.util.NeuralNetworkFactory;
import org.neuroph.util.NeuralNetworkType;
import org.neuroph.util.NeuronProperties;
import org.neuroph.util.TransferFunctionType;

/**
* Outstar neural network with Outstar learning rule.
* @author Zoran Sevarac <sevarac@gmail.com>
*/
public class Outstar extends NeuralNetwork {

  /**
   * The class fingerprint that is set to indicate serialization
   * compatibility with a previous version of the class.
   */ 
  private static final long serialVersionUID = 1L;

  /**
   * Creates an instance of Outstar network with specified number of neurons
     * in output layer.
   *
   * @param outputNeuronsCount
   *            number of neurons in output layer
   */
  public Outstar(int outputNeuronsCount) {
    this.createNetwork(outputNeuronsCount);
 
 
  /**
   * Creates Outstar architecture with specified number of neurons in
   * output layer
   *
   * @param outputNeuronsCount
   *            number of neurons in output layer
   */
  private void createNetwork(int outputNeuronsCount ) {

    // set network type
    this.setNetworkType(NeuralNetworkType.OUTSTAR);

    // init neuron settings for this type of network
    NeuronProperties neuronProperties = new NeuronProperties();
    neuronProperties.setProperty("transferFunction", TransferFunctionType.STEP);
   
    // create input layer
    Layer inputLayer = LayerFactory.createLayer(1, neuronProperties);
    this.addLayer(inputLayer);

    // createLayer output layer
    neuronProperties.setProperty("transferFunction", TransferFunctionType.RAMP);
    Layer outputLayer = LayerFactory.createLayer(outputNeuronsCount,  neuronProperties);
    this.addLayer(outputLayer);

    // create full conectivity between input and output layer
    ConnectionFactory.fullConnect(inputLayer, outputLayer);

    // set input and output cells for this network
    NeuralNetworkFactory.setDefaultIO(this);

    // set outstar learning rule for this network
    this.setLearningRule(new OutstarLearning());
  }   
 
}
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