50 Algorithms Every Programmer Should Know - Second Edition

6

Unsupervised Machine Learning Algorithms

This chapter is about unsupervised machine learning algorithms. We aim, by the end of this chapter, to be able to understand how unsupervised learning, with its basic algorithms and methodologies, can be effectively applied to solve real-world problems.

We will cover the following topics:

• Introducing unsupervised learning
• Understanding clustering algorithms
• Dimensionality reduction
• Association rules mining

Introducing unsupervised learning

If the data is not generated randomly, it tends to exhibit certain patterns or relationships among its elements within a multi-dimensional space. Unsupervised learning involves the process of detecting and utilizing these patterns within a dataset to structure and ...