Hierarchical clustering In agglomerative hierarchical clustering we start with the points as individual clusters At each step, we merge the closest pair of clusters This requires defining a notion of cluster proximity 8/20/2016 PATTERN RECOGNITIONHierarchical clustering In agglomerative hierarchical clustering, we start with the points as individual clusters. At each step, we merge the closest pair of clusters. This requires defining a notion of cluster proximity. 8/20/2016 PATTERN RECOGNITION 41