/// <summary>
/// Use an array to populate the memory of the neural network.
/// </summary>
/// <param name="array">An array of doubles.</param>
/// <param name="network">The network to encode.</param>
public static void ArrayToNetwork(double[] array,
BasicNetwork network)
{
int index = 0;
foreach (ILayer layer in network.Structure.Layers)
{
index = NetworkCODEC.ProcessLayer(network, layer, array, index);
}
network.Structure.FlatUpdate = FlatUpdateNeeded.Flatten;
}
/// <summary>
/// Flatten the weights of a neural network.
/// </summary>
public void FlattenWeights()
{
if (this.flat != null)
{
this.flatUpdate = FlatUpdateNeeded.Flatten;
double[] targetWeights = this.flat.Weights;
double[] sourceWeights = NetworkCODEC.NetworkToArray(this.network);
EngineArray.ArrayCopy(sourceWeights, targetWeights);
this.flatUpdate = FlatUpdateNeeded.None;
// update context layers
foreach (ILayer layer in this.layers)
{
if (layer is ContextLayer)
{
ContextLayer context = (ContextLayer)layer;
if (context.FlatContextIndex != -1)
{
EngineArray.ArrayCopy(
context.Context.Data,
0,
this.flat.LayerOutput,
context.FlatContextIndex,
context.Context.Count);
}
}
}
// handle limited connection networks
if (this.connectionLimited)
{
this.flat.ConnectionLimit = this.connectionLimit;
}
else
{
this.flat.ClearConnectionLimit();
}
}
}
/// <summary>
/// Determine if the two neural networks are equal.
/// </summary>
/// <param name="network1">The first network.</param>
/// <param name="network2">The second network.</param>
/// <param name="precision">How many decimal places to check.</param>
/// <returns>True if the two networks are equal.</returns>
public static bool Equals(BasicNetwork network1,
BasicNetwork network2, int precision)
{
double[] array1 = NetworkCODEC.NetworkToArray(network1);
double[] array2 = NetworkCODEC.NetworkToArray(network2);
if (array1.Length != array2.Length)
{
return(false);
}
double test = Math.Pow(10.0, precision);
if (double.IsInfinity(test) || (test > long.MaxValue))
{
String str = "Precision of " + precision
+ " decimal places is not supported.";
#if logging
if (NetworkCODEC.LOGGER.IsErrorEnabled)
{
NetworkCODEC.LOGGER.Error(str);
}
#endif
throw new NeuralNetworkError(str);
}
foreach (double element in array1)
{
long l1 = (long)(element * test);
long l2 = (long)(element * test);
if (l1 != l2)
{
return(false);
}
}
return(true);
}
/// <summary>
/// Calculate the size that an array should be to hold all of the weights and
/// bias values.
/// </summary>
///
/// <returns>The size of the calculated array.</returns>
public int CalculateSize()
{
return(NetworkCODEC.NetworkSize(_network));
}
