Summary

Using a McCulloch-Pitts neuron with a logistic activation function in a one-layer network to build a reward matrix for reinforcement learning shows one way to preprocess a dataset.

Processing real-life data often requires a generalization of a logistic sigmoid function through a softmax function, and a one-hot function applied to logits to encode the data.

Machine learning functions are tools that must be understood to be able to use all or parts of them to solve a problem. With this practical approach to artificial intelligence, a whole world of projects awaits you.

This neuronal approach is the parent of the multilayer perceptron that will be introduced starting in Chapter 8, Solving the XOR Problem with a Feedforward Neural Network.

This chapter went from an experimental black box machine learning and deep learning to white box implementation. Implementation requires a full understanding of machine learning algorithms that often require fine-tuning.

However, artificial intelligence goes beyond understanding machine learning algorithms. Machine learning or deep learning require evaluation functions. Performance or results cannot be validated without evaluation functions, as explained in Chapter 3, Machine Intelligence – Evaluation Functions and Numerical Convergence.

In the next chapter, the evaluation process of machine intelligence will be illustrated by examples that show the limits of human intelligence and the rise of machine power.