Exemple #1
0
func (h *HiddenLayer) BackwardWithTarget(predicted, target []float64) []float64 {
	delta := make([]float64, h.NumHiddenUnits)
	for i := 0; i < h.NumHiddenUnits; i++ {
		delta[i] = (predicted[i] - target[i]) * nnet.DSigmoid(predicted[i])
	}
	return delta
}
Exemple #2
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func (h *HiddenLayer) Backward(predicted, accumulateDelta []float64) []float64 {
	delta := make([]float64, h.NumHiddenUnits)
	for i := 0; i < h.NumHiddenUnits; i++ {
		delta[i] = accumulateDelta[i] * nnet.DSigmoid(predicted[i])
	}
	return delta
}
Exemple #3
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func (net *NeuralNetwork) ComputeDelta(predicted,
	target []float64) ([]float64, []float64) {
	outputDelta := make([]float64, len(net.OutputLayer))
	hiddenDelta := make([]float64, len(net.HiddenLayer))

	// Output Delta
	for i := 0; i < len(net.OutputLayer); i++ {
		outputDelta[i] = (predicted[i] - target[i]) *
			nnet.DSigmoid(predicted[i])
	}

	// Hidden Delta
	for i := 0; i < len(net.HiddenLayer); i++ {
		sum := 0.0
		for j := range net.OutputLayer {
			sum += net.OutputWeight[i][j] * outputDelta[j]
		}
		hiddenDelta[i] = sum * nnet.DSigmoid(net.HiddenLayer[i])
	}

	return outputDelta, hiddenDelta
}