public static InstanceValues CreateRandomInstanceValues(int[] layerSizes, double[] inputs, Random random)
{
int nodeBiasAmount = 0;
int connectionAmount = 0;
for (int i = 1; i < layerSizes.Length; i++)
{
nodeBiasAmount += layerSizes[i];
connectionAmount += layerSizes[i - 1] * layerSizes[i];
}
double[] nodeBiases = new double[nodeBiasAmount];
for (int i = 0; i < nodeBiasAmount; i++)
{
nodeBiases[i] = random.NextDouble();
}
double[] connectionWeights = new double[connectionAmount];
for (int i = 0; i < connectionAmount; i++)
{
connectionWeights[i] = random.NextDouble();
}
InstanceValues instanceValues = new InstanceValues(layerSizes, inputs, nodeBiases, connectionWeights);
return(instanceValues);
}
public static double[] CalculateOutputs(InstanceValues instanceValues)
{
int[] layerSizes = instanceValues.layerSizes;
double[] inputs = instanceValues.inputs;
double[] nodeBiases = instanceValues.nodeBiases;
double[] connectionWeights = instanceValues.connectionWeights;
int nodeBiasCounter = 0;
int connectionWeightCounter = 0;
double[] currentNodeValues = new double[layerSizes[0]];
for (int i = 0; i < layerSizes[0]; i++)
{
currentNodeValues[i] = inputs[i];
}
for (int i = 1; i < layerSizes.Length; i++)
{
// for every layer of nodes except the input layer
int amountOfNewNodes = layerSizes[i];
double[] newNodeBiases = new double[amountOfNewNodes];
Array.Copy(nodeBiases, nodeBiasCounter, newNodeBiases, 0, amountOfNewNodes);
nodeBiasCounter += amountOfNewNodes;
int amountOfConnections = layerSizes[i - 1] * layerSizes[i];
double[] connectionWeightsForThisLayer = new double[amountOfConnections];
Array.Copy(connectionWeights, connectionWeightCounter, connectionWeightsForThisLayer, 0, amountOfConnections);
connectionWeightCounter += amountOfConnections;
currentNodeValues = CalculateNextLayer(currentNodeValues, newNodeBiases, connectionWeightsForThisLayer);
}
return(currentNodeValues);
}
public InstanceValues(InstanceValues instanceValues)
{
this.layerSizes = instanceValues.layerSizes;
this.inputs = instanceValues.inputs;
this.nodeBiases = instanceValues.nodeBiases;
this.connectionWeights = instanceValues.connectionWeights;
}
static void Main(string[] args)
{
//test();
int[] layerSizes = new int[] { 2, 3, 3, 2 };
double[] inputValues = new double[] { 1d, 1d };
InstanceValues instanceValues = InstanceValues.CreateRandomInstanceValues(layerSizes, inputValues, new Random());
double[] outputs = Instance.CalculateOutputs(instanceValues);
Console.WriteLine(outputs[0] + " | " + outputs[1]);
outputs = Instance.CalculateOutputs(instanceValues.Reproduce(1, 0.2d, new Random()));
Console.WriteLine(outputs[0] + " | " + outputs[1]);
Console.ReadKey();
}
public static InstanceValues CreateBaseInstanceValues(int[] layerSizes, double[] inputs, double nodeBaseBias, double connectionBaseWeight)
{
int nodeBiasAmount = 0;
int connectionAmount = 0;
for (int i = 1; i < layerSizes.Length; i++)
{
nodeBiasAmount += layerSizes[i];
connectionAmount += layerSizes[i - 1] * layerSizes[i];
}
double[] nodeBiases = new double[nodeBiasAmount];
Array.Fill <double>(nodeBiases, nodeBaseBias);
double[] connectionWeights = new double[connectionAmount];
Array.Fill <double>(connectionWeights, connectionBaseWeight);
InstanceValues instanceValues = new InstanceValues(layerSizes, inputs, nodeBiases, connectionWeights);
return(instanceValues);
}
public InstanceValues Reproduce(int WeightsToChange, double maxChange, Random random)
{
InstanceValues returnValues = new InstanceValues(this);
int nodeAmount = nodeBiases.Length;
int connectionAmount = connectionWeights.Length;
for (int i = 0; i < WeightsToChange; i++)
{
int weightToChange = random.Next(nodeAmount + connectionAmount);
if (weightToChange < nodeAmount)
{
returnValues.nodeBiases[weightToChange] += (random.NextDouble() - 0.5d) * 2 * maxChange;
}
else
{
returnValues.connectionWeights[weightToChange - nodeAmount] += (random.NextDouble() - 0.5d) * 2 * maxChange;
}
}
return(returnValues);
}
private static void test()
{
Console.WriteLine("automatically created instancevalues with base values:");
int[] layerSizess = new int[] { 2, 3, 3, 2 };
double[] inputValuess = new double[] { 1d, 1d };
InstanceValues instanceValuess = InstanceValues.CreateBaseInstanceValues(layerSizess, inputValuess, 0, 1);
double[] outputss = Instance.CalculateOutputs(instanceValuess);
Console.WriteLine(outputss[0] + " | " + outputss[1]);
Console.WriteLine("automatically created instancevalues with random values:");
int[] layerSizes = new int[] { 2, 3, 3, 2 };
double[] inputValues = new double[] { 1d, 1d };
InstanceValues instanceValues = InstanceValues.CreateRandomInstanceValues(layerSizes, inputValues, new Random());
double[] outputs = Instance.CalculateOutputs(instanceValues);
Console.WriteLine(outputs[0] + " | " + outputs[1]);
Console.ReadKey();
}
