juniorUnsupervised Learning
What is hierarchical clustering?
Updated May 15, 2026
Short answer
Hierarchical clustering builds nested clusters in a tree structure.
Deep explanation
It can be agglomerative or divisive, merging or splitting clusters iteratively.
Real-world example
Organizing documents into topic hierarchies.
Common mistakes
- Assuming it scales well to large datasets.
Follow-up questions
- What is dendrogram?
- What are linkage methods?