Outline a Cluster basics Clustering algorithms a Hierarchical clustering a K-means a Expectation-Maximization(EM) a Cluster Validity n determining the number of clusters a Clustering evaluation2 Outline ◼ Cluster Basics ◼ Clustering algorithms  Hierarchical clustering  k-means  Expectation-Maximization (EM) ◼ Cluster Validity  determining the number of clusters  clustering evaluation