public void CalculateOutputGradient(double target)
{
double delta = target - this.Output;
this.Gradient = delta * Neuron.ActivationDerivative(this.Output);
}
/// <summary>
/// Calculate the hidden gradient based on the sum
/// of the weight to the nodes in the next layer
/// multiplied by the hidden gradient of those
/// nodes.
/// </summary>
public void CalculateHiddenGradient()
{
double dow = this.SumDOW();
this.Gradient = dow * Neuron.ActivationDerivative(this.Output);
}
