/// <inheritdoc />
public override sealed void Iteration()
{
if (_mustInit)
{
InitWeight();
}
var error = new ErrorCalculation();
foreach (IMLDataPair pair in _training)
{
IMLData xout = _network.ComputeInstar(pair.Input);
int j = EngineArray.IndexOfLargest(xout);
for (int i = 0; i < _network.OutstarCount; i++)
{
double delta = _learningRate
* (pair.Ideal[i] - _network.WeightsInstarToOutstar[j, i]);
_network.WeightsInstarToOutstar.Add(j, i, delta);
}
IMLData out2 = _network.ComputeOutstar(xout);
error.UpdateError(out2, pair.Ideal, pair.Significance);
}
Error = error.Calculate();
}
/// <summary>
/// Determine the class using part of an array.
/// </summary>
///
/// <param name="pos">The position to begin.</param>
/// <param name="data">The array to check.</param>
/// <returns>The class item.</returns>
public ClassItem DetermineClass(int pos, IMLData data)
{
int resultIndex = 0;
var d = new double[ColumnsNeeded];
for (int i = 0; i < d.Length; i++)
{
d[i] = data[pos + i];
}
switch (_action)
{
case NormalizationAction.Equilateral:
resultIndex = _eq.Decode(d);
break;
case NormalizationAction.OneOf:
resultIndex = EngineArray.IndexOfLargest(d);
break;
case NormalizationAction.SingleField:
resultIndex = (int)d[0];
break;
default:
throw new AnalystError("Invalid action: " + _action);
}
if (resultIndex < 0)
{
return(null);
}
return(_classes[resultIndex]);
}
/// <summary>
/// Determine the winner for the specified input. This is the number of the
/// winning neuron.
/// </summary>
///
/// <param name="input">The input pattern.</param>
/// <returns>The winning neuron.</returns>
public int Winner(IMLData input)
{
IMLData output = Compute(input);
int win = EngineArray.IndexOfLargest(output.Data);
return(win);
}
/// <inheritdoc />
public override sealed void Iteration()
{
if (_mustInit)
{
InitWeights();
}
double worstDistance = Double.NegativeInfinity;
foreach (IMLDataPair pair in _training)
{
IMLData xout = _network.ComputeInstar(pair.Input);
// determine winner
int winner = EngineArray.IndexOfLargest(xout);
// calculate the distance
double distance = 0;
for (int i = 0; i < pair.Input.Count; i++)
{
double diff = pair.Input[i]
- _network.WeightsInputToInstar[i, winner];
distance += diff * diff;
}
distance = BoundMath.Sqrt(distance);
if (distance > worstDistance)
{
worstDistance = distance;
}
// train
for (int j = 0; j < _network.InputCount; j++)
{
double delta = _learningRate
* (pair.Input[j] - _network.WeightsInputToInstar[j, winner]);
_network.WeightsInputToInstar.Add(j, winner, delta);
}
}
Error = worstDistance;
}
/// <summary>
/// Determine what class the specified data belongs to.
/// </summary>
///
/// <param name="data">The data to analyze.</param>
/// <returns>The class the data belongs to.</returns>
public ClassItem DetermineClass(double[] data)
{
int resultIndex;
switch (_action)
{
case NormalizationAction.Equilateral:
resultIndex = _eq.Decode(data);
break;
case NormalizationAction.OneOf:
resultIndex = EngineArray.IndexOfLargest(data);
break;
case NormalizationAction.SingleField:
resultIndex = (int)data[0];
break;
default:
throw new QuantError("Unknown action: " + _action);
}
return(_classes[resultIndex]);
}
