public float GetBiasAdjust(float[,] activationArray, float cost)
{
if (float.IsNaN(cost) || float.IsNaN(activationArray[1, 0]))
{
throw new Exception();
}
var activation = activationArray[NeuronLocation.Layer, NeuronLocation.Neuron];
var derivative = cost * _activationFunction.GetDerivedValue(activation);
return(derivative);
}