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Comparison of Activation Functions - Sigmoid, ReLU, and Softmax

Activation functions transform input values in an artificial neural network and transmit them to the next layer.

The Sigmoid, ReLU (Rectified Linear Unit), and Softmax functions that you have learned so far each have their own characteristics, advantages, and disadvantages.


Comparison of Activation Functions

FunctionOutput RangeFeatures and AdvantagesDisadvantages and Limitations
Sigmoid(0, 1)Probabilistic interpretation, suitable for binary classificationVanishing gradient problem for large values
ReLU(0, ∞)Alleviates vanishing gradient problem, simple to computeNeuron deactivation for values ≤ 0
Softmax(0, 1)Suitable for multi-class classification, provides probability valuesOne class value can influence other classes

Activation functions have a significant impact on the performance of neural network models.

It's important to choose the appropriate activation function based on the problem's characteristics.

In the next lesson, we will take a brief quiz to review what we've learned so far.

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