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## org.neuroph.nnet.learning
Class UnsupervisedHebbianLearning

    java.lang.Object
      java.util.Observable
          org.neuroph.core.learning.LearningRule
              org.neuroph.core.learning.IterativeLearning
                  org.neuroph.core.learning.UnsupervisedLearning
                      org.neuroph.nnet.learning.UnsupervisedHebbianLearning

All Implemented Interfaces:
  java.io.Serializable, java.lang.Runnable

Direct Known Subclasses:
  BinaryHebbianLearning, InstarLearning, OjaLearning, OutstarLearning

    public class UnsupervisedHebbianLearning

extends UnsupervisedLearning

Unsupervised hebbian learning rule.

See Also:
  Serialized Form

Field Summary

Fields inherited from class org.neuroph.core.learning.IterativeLearning
`currentIteration, iterationsLimited, learningRate, maxIterations`

Fields inherited from class org.neuroph.core.learning.LearningRule
`neuralNetwork`

Constructor Summary
`UnsupervisedHebbianLearning()` Creates new instance of UnsupervisedHebbianLearning algorithm
`UnsupervisedHebbianLearning(NeuralNetwork neuralNetwork)` Creates an instance of UnsupervisedHebbianLearning algorithm for the specified neural network

Method Summary
`protected void` | `adjustWeights()` Adjusts weights for the output neurons
`void` | `doLearningEpoch(TrainingSet trainingSet)` This method does one learning epoch for the unsupervised learning rules.
`protected void` | `updateNeuronWeights(Neuron neuron)` This method implements weights update procedure for the single neuron

Methods inherited from class org.neuroph.core.learning.UnsupervisedLearning
`learnPattern`

Methods inherited from class org.neuroph.core.learning.IterativeLearning
`getCurrentIteration, getLearningRate, learn, setLearningRate, setMaxIterations`

Methods inherited from class org.neuroph.core.learning.LearningRule
`getNeuralNetwork, getTrainingSet, isStopped, notifyChange, run, setNeuralNetwork, setTrainingSet, stopLearning`

Methods inherited from class java.util.Observable
`addObserver, clearChanged, countObservers, deleteObserver, deleteObservers, hasChanged, notifyObservers, notifyObservers, setChanged`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### UnsupervisedHebbianLearning

    public UnsupervisedHebbianLearning()

  Creates new instance of UnsupervisedHebbianLearning algorithm

### UnsupervisedHebbianLearning

    public UnsupervisedHebbianLearning(NeuralNetwork neuralNetwork)

  Creates an instance of UnsupervisedHebbianLearning algorithm for the specified neural network

  Parameters:
    `neuralNetwork` - neural network to train

Method Detail

### doLearningEpoch

    public void doLearningEpoch(TrainingSet trainingSet)

  This method does one learning epoch for the unsupervised learning rules. It iterates through the training set and trains network weights for each element. Stops learning after one epoch.

  Overrides:
    `doLearningEpoch` in class `UnsupervisedLearning`
  Parameters:
    `trainingSet` - training set for training network

### adjustWeights

    protected void adjustWeights()

  Adjusts weights for the output neurons

  Specified by:
    `adjustWeights` in class `UnsupervisedLearning`

### updateNeuronWeights

    protected void updateNeuronWeights(Neuron neuron)

  This method implements weights update procedure for the single neuron

  Parameters:
    `neuron` - neuron to update weights

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