/// <summary>
/// Compute the output for a given input to the neural network. This method
/// provides a parameter to specify an output holder to use. This holder
/// allows propagation training to track the output from each layer.
/// If you do not need this holder pass null, or use the other
/// compare method.
/// </summary>
/// <param name="input">The input provide to the neural network.</param>
/// <param name="useHolder">Allows a holder to be specified, this allows
/// propagation training to check the output of each layer.</param>
/// <returns>The results from the output neurons.</returns>
public virtual INeuralData Compute(INeuralData input,
NeuralOutputHolder useHolder)
{
NeuralOutputHolder holder;
ILayer inputLayer = this.network.GetLayer(BasicNetwork.TAG_INPUT);
#if logging
if (FeedforwardLogic.logger.IsDebugEnabled)
{
FeedforwardLogic.logger.Debug("Pattern " + input.ToString()
+ " presented to neural network");
}
#endif
if (useHolder == null && this.network.Structure.Flat != null)
{
this.network.Structure.UpdateFlatNetwork();
INeuralData result = new BasicNeuralData(this.network.Structure.Flat.OutputCount);
this.network.Structure.Flat.Compute(input.Data, result.Data);
return(result);
}
if (useHolder == null)
{
holder = new NeuralOutputHolder();
}
else
{
holder = useHolder;
}
Compute(holder, inputLayer, input, null);
return(holder.Output);
}
/// <summary>
/// Internal computation method for a single layer. This is called,
/// as the neural network processes.
/// </summary>
/// <param name="holder">The output holder.</param>
/// <param name="layer">The layer to process.</param>
/// <param name="input">The input to this layer.</param>
/// <param name="source">The source synapse.</param>
private void Compute(NeuralOutputHolder holder, ILayer layer,
INeuralData input, ISynapse source)
{
try
{
#if logging
if (FeedforwardLogic.logger.IsDebugEnabled)
{
FeedforwardLogic.logger.Debug("Processing layer: "
+ layer.ToString()
+ ", input= "
+ input.ToString());
}
#endif
// typically used to process any recurrent layers that feed into this
// layer.
PreprocessLayer(layer, input, source);
foreach (ISynapse synapse in layer.Next)
{
if (!holder.Result.ContainsKey(synapse))
{
#if logging
if (FeedforwardLogic.logger.IsDebugEnabled)
{
FeedforwardLogic.logger.Debug("Processing synapse: " + synapse.ToString());
}
#endif
INeuralData pattern = synapse.Compute(input);
pattern = synapse.ToLayer.Compute(pattern);
synapse.ToLayer.Process(pattern);
holder.Result[synapse] = input;
Compute(holder, synapse.ToLayer, pattern, synapse);
ILayer outputLayer = this.network.GetLayer(BasicNetwork.TAG_OUTPUT);
// Is this the output from the entire network?
if (synapse.ToLayer == outputLayer)
{
holder.Output = pattern;
}
}
}
}
catch (IndexOutOfRangeException ex)
{
throw new NeuralNetworkError("Size mismatch on input of size " + input.Count + " and layer: ", ex);
}
}
/// <summary>
/// Handle recurrent layers. See if there are any recurrent layers before
/// the specified layer that must affect the input.
/// </summary>
/// <param name="layer">The layer being processed, see if there are any recurrent
/// connections to this.</param>
/// <param name="input">The input to the layer, will be modified with the result
/// from any recurrent layers.</param>
/// <param name="source">The source synapse.</param>
public override void PreprocessLayer(ILayer layer,
INeuralData input, ISynapse source)
{
foreach (ISynapse synapse in
this.Network.Structure.GetPreviousSynapses(layer))
{
if (synapse != source)
{
#if logging
if (SimpleRecurrentLogic.logger.IsDebugEnabled)
{
SimpleRecurrentLogic.logger.Debug("Recurrent layer from: " + input.ToString());
}
#endif
INeuralData recurrentInput = synapse.FromLayer.Recur();
if (recurrentInput != null)
{
INeuralData recurrentOutput = synapse
.Compute(recurrentInput);
for (int i = 0; i < input.Count; i++)
{
input[i] = input[i]
+ recurrentOutput[i];
}
#if logging
if (SimpleRecurrentLogic.logger.IsDebugEnabled)
{
SimpleRecurrentLogic.logger.Debug("Recurrent layer to: " + input.ToString());
}
#endif
}
}
}
}
/// <summary>
/// Handle recurrent layers. See if there are any recurrent layers before
/// the specified layer that must affect the input.
/// </summary>
/// <param name="layer">The layer being processed, see if there are any recurrent
/// connections to this.</param>
/// <param name="input">The input to the layer, will be modified with the result
/// from any recurrent layers.</param>
/// <param name="source">The source synapse.</param>
public override void PreprocessLayer(ILayer layer,
INeuralData input, ISynapse source)
{
foreach (ISynapse synapse in
this.Network.Structure.GetPreviousSynapses(layer))
{
if (synapse != source)
{
#if logging
if (SimpleRecurrentLogic.logger.IsDebugEnabled)
{
SimpleRecurrentLogic.logger.Debug("Recurrent layer from: " + input.ToString());
}
#endif
INeuralData recurrentInput = synapse.FromLayer.Recur();
if (recurrentInput != null)
{
INeuralData recurrentOutput = synapse
.Compute(recurrentInput);
for (int i = 0; i < input.Count; i++)
{
input[i] = input[i]
+ recurrentOutput[i];
}
#if logging
if (SimpleRecurrentLogic.logger.IsDebugEnabled)
{
SimpleRecurrentLogic.logger.Debug("Recurrent layer to: " + input.ToString());
}
#endif
}
}
}
}
/// <summary>
/// Compute the output for a given input to the neural network. This method
/// provides a parameter to specify an output holder to use. This holder
/// allows propagation training to track the output from each layer.
/// If you do not need this holder pass null, or use the other
/// compare method.
/// </summary>
/// <param name="input">The input provide to the neural network.</param>
/// <param name="useHolder">Allows a holder to be specified, this allows
/// propagation training to check the output of each layer.</param>
/// <returns>The results from the output neurons.</returns>
public virtual INeuralData Compute(INeuralData input,
NeuralOutputHolder useHolder)
{
NeuralOutputHolder holder;
ILayer inputLayer = this.network.GetLayer(BasicNetwork.TAG_INPUT);
#if logging
if (FeedforwardLogic.logger.IsDebugEnabled)
{
FeedforwardLogic.logger.Debug("Pattern " + input.ToString()
+ " presented to neural network");
}
#endif
if (useHolder == null && this.network.Structure.Flat != null)
{
this.network.Structure.UpdateFlatNetwork();
INeuralData result = new BasicNeuralData(this.network.Structure.Flat.OutputCount);
this.network.Structure.Flat.Compute(input.Data, result.Data);
return result;
}
if (useHolder == null)
{
holder = new NeuralOutputHolder();
}
else
{
holder = useHolder;
}
Compute(holder, inputLayer, input, null);
return holder.Output;
}
/// <summary>
/// Internal computation method for a single layer. This is called,
/// as the neural network processes.
/// </summary>
/// <param name="holder">The output holder.</param>
/// <param name="layer">The layer to process.</param>
/// <param name="input">The input to this layer.</param>
/// <param name="source">The source synapse.</param>
private void Compute(NeuralOutputHolder holder, ILayer layer,
INeuralData input, ISynapse source)
{
try
{
#if logging
if (FeedforwardLogic.logger.IsDebugEnabled)
{
FeedforwardLogic.logger.Debug("Processing layer: "
+ layer.ToString()
+ ", input= "
+ input.ToString());
}
#endif
// typically used to process any recurrent layers that feed into this
// layer.
PreprocessLayer(layer, input, source);
foreach (ISynapse synapse in layer.Next)
{
if (!holder.Result.ContainsKey(synapse))
{
#if logging
if (FeedforwardLogic.logger.IsDebugEnabled)
{
FeedforwardLogic.logger.Debug("Processing synapse: " + synapse.ToString());
}
#endif
INeuralData pattern = synapse.Compute(input);
pattern = synapse.ToLayer.Compute(pattern);
synapse.ToLayer.Process(pattern);
holder.Result[synapse] = input;
Compute(holder, synapse.ToLayer, pattern, synapse);
ILayer outputLayer = this.network.GetLayer(BasicNetwork.TAG_OUTPUT);
// Is this the output from the entire network?
if (synapse.ToLayer == outputLayer)
{
holder.Output = pattern;
}
}
}
}
catch (IndexOutOfRangeException ex)
{
throw new NeuralNetworkError("Size mismatch on input of size " + input.Count + " and layer: ", ex);
}
}
