Table 1.

Types of machine learning

ML Type	Defined question asked?	Is data labeled?	Outputs	Example Algorithms
Supervised	Yes	Yes (fully)	Classification Real values	Linear regression Logistic regression Decision trees Neural networks
Unsupervised	No	No	Clustering Association	K-means clustering Principal component analysis K-nearest neighbors
Semi-supervised	Yes	Yes (partly)	Classification Real values Clustering Association	Any supervised or unsupervised method
Reinforcement	Yes	No (rules supplied instead)	Actions moving toward a solution	Temporal-difference Q-learning SARSA