Different types of learning
Unsupervised statistical machine learning

Let's start by recalling how supervised learning compares with other forms of machine learning and data processing. We generally distinguish three forms of machine learning: supervised learning, reinforcement learning and unsupervised learning.

Supervised learning involves learning a function f:x→y = f(x) from a database consisting of a large number of example pairs (x _i ,y _i ). The development of deep learning, i.e. software using multi-layer neural networks, has enabled this form of learning to achieve spectacular success in recent years in image analysis, speech recognition and natural language processing