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Class: BasicNetwork Bio/NeuralNetwork/BackPropagation/Network.py

Represent a Basic Neural Network with three layers.

This deals with a Neural Network containing three layers:

  • Input Layer

  • Hidden Layer

  • Output Layer

Methods   
__init__
predict
train
  __init__ 
__init__ (
        self,
        input_layer,
        hidden_layer,
        output_layer,
        )

Initialize the network with the three layers.

  predict 
predict ( self,  inputs )

Predict outputs from the neural network with the given inputs.

This uses the current neural network to predict outputs, no training of the neural network is done here.

  train 
train (
        self,
        training_examples,
        validation_examples,
        stopping_criteria,
        learning_rate,
        momentum,
        )

Train the neural network to recognize particular examples.

Arguments:

  • training_examples -- A list of TrainingExample classes that will be used to train the network.

  • validation_examples -- A list of TrainingExample classes that are used to validate the network as it is trained. These examples are not used to train so the provide an independent method of checking how the training is doing. Normally, when the error from these examples starts to rise, then it's time to stop training.

  • stopping_criteria -- A function, that when passed the number of iterations, the training error, and the validation error, will determine when to stop learning.

  • learning_rate -- The learning rate of the neural network.

  • momentum -- The momentum of the NN, which describes how much of the prevoious weight change to use.


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This document was automatically generated on Mon Jul 1 12:03:11 2002 by HappyDoc version 2.0.1