Definition of machine learning:

• A computer program is said to learn from experience E with respect to some task T and some performance measure P, if its performance on T, as measured by P, improves with experience E

Machine learning algorithms:

• Supervised learning
• Unsupervised learning
• Others: Reinforcement learning, recommender systems

Supervise Learning

Giving the "right answer" for each example in the data

• Regression Problem

Predict real-valued output

• Classification Problem

Unsupervised learning

• Clustering