public static void Optimize(
string inputFileName, string outputFileName,
int[][] layers,
double minThreshold, double maxThreshold, double thresholdStepSize,
int minTrades,
int iterations,
int randomize,
string[] validationFileNames)
{
FsdParser inputParser = FsdParser.FromFile(inputFileName);
FsdParser[] validationParsers = new FsdParser[validationFileNames.Length];
for (int valParIdx = 0; valParIdx < validationParsers.Length; valParIdx++)
{
validationParsers[valParIdx] =
FsdParser.FromFile(validationFileNames[valParIdx]);
}
Optimize(
inputParser, outputFileName,
layers,
minThreshold, maxThreshold, thresholdStepSize,
minTrades,
iterations,
randomize,
validationParsers);
}
public static void Optimize(
FsdParser inputParser, string outputFileName,
int[][] layers,
double minThreshold, double maxThreshold, double thresholdStepSize,
int minTrades,
int iterations,
int randomize,
FsdParser[] validationParsers)
{
HashSet<int[]> layerCombinations;
getLayerCombinations(layers, out layerCombinations);
Network bestNetwork = null;
double bestThreshold = double.NaN;
double bestMinWinRate = double.NegativeInfinity;
int cursorLeft = Console.CursorLeft;
int cursorTop = Console.CursorTop;
int numTotalIterations = (int)(layerCombinations.Count * ((maxThreshold - minThreshold) / thresholdStepSize + 1) * iterations);
int numIterations = 0;
foreach (int[] layerCombination in layerCombinations)
{
ActivationNetwork network = new ActivationNetwork(
new SigmoidFunction(),
inputParser.InputVectors[0].Length,
layerCombination);
network.Randomize();
ParallelResilientBackpropagationLearning teacher = new ParallelResilientBackpropagationLearning(network);
for (double threshold = minThreshold; threshold <= maxThreshold; threshold += thresholdStepSize)
{
for (int iteration = 1; iteration <= iterations; iteration++)
{
numIterations++;
Console.CursorLeft = cursorLeft;
Console.CursorTop = cursorTop;
Console.Write(new string(' ', Console.BufferWidth * 10));
Console.CursorLeft = cursorLeft;
Console.CursorTop = cursorTop;
Console.Write("layerCombination[]: { ");
for (int layerComponentIdx = 0; layerComponentIdx < layerCombination.Length; layerComponentIdx++)
{
Console.Write(layerCombination[layerComponentIdx]);
if (layerComponentIdx < layerCombination.Length - 1)
Console.Write(", ");
}
Console.WriteLine(" }");
Console.WriteLine("threshold: {0:0.00}", threshold);
Console.WriteLine("iteration: {0}", iteration);
Console.WriteLine("bestMinWinRate: {0:0.00}%", bestMinWinRate);
Console.WriteLine("");
Console.WriteLine("Progress: {0:0.00}%", (double)numIterations / numTotalIterations * 100.0);
if (randomize > 0 && (iteration - 1) % randomize == 0)
network.Randomize();
teacher.RunEpoch(inputParser.InputVectors, inputParser.OutputVectors);
bool validData = true;
double minWinRate = double.PositiveInfinity;
foreach (FsdParser validationParser in validationParsers)
{
int numTradesWon, numTradesLost;
double tradeWinRate;
getStatistics(network, validationParser, threshold, out numTradesWon, out numTradesLost, out tradeWinRate);
if (numTradesWon + numTradesLost < minTrades)
{
validData = false;
break;
}
minWinRate = Math.Min(minWinRate, tradeWinRate);
if (minWinRate < bestMinWinRate)
{
validData = false;
break;
}
}
if (validData)
{
bestNetwork = network;
bestThreshold = threshold;
bestMinWinRate = minWinRate;
network.Save(outputFileName);
// Konfigurationsinformationen speichern
string configuration = "";
configuration += "layerCombination[]: { ";
for (int layerComponentIdx = 0; layerComponentIdx < layerCombination.Length; layerComponentIdx++)
{
configuration += layerCombination[layerComponentIdx];
if (layerComponentIdx < layerCombination.Length - 1)
configuration += ", ";
}
configuration += " }\r\n";
configuration += string.Format("threshold: {0:0.00}\r\n", threshold);
configuration += string.Format("iteration: {0}\r\n", iteration);
configuration += string.Format("bestMinWinRate: {0:0.00}%\r\n", bestMinWinRate);
File.WriteAllText(outputFileName + ".txt", configuration);
}
}
}
}
}
private static void getStatistics(Network network, FsdParser parser, double threshold,
out int numTradesWon, out int numTradesLost, out double tradeWinRate)
{
numTradesWon = 0;
numTradesLost = 0;
int numSamples = parser.InputVectors.Length;
for (int sampleIdx = 0; sampleIdx < numSamples; sampleIdx++)
{
double[] computed = network.Compute(parser.InputVectors[sampleIdx]);
if (computed[0] > threshold && computed[1] < threshold)
{
// Netzwerk hat "Rise" errechnet
if (parser.OutputVectors[sampleIdx][0] == 1)
{
numTradesWon++;
}
else
{
numTradesLost++;
}
}
else if (computed[1] > threshold && computed[0] < threshold)
{
// Netzwerk hat "Fall" errechnet
if (parser.OutputVectors[sampleIdx][1] == 1)
{
numTradesWon++;
}
else
{
numTradesLost++;
}
}
}
tradeWinRate = (double)numTradesWon / (numTradesWon + numTradesLost);
}