1 What's Cluster Analysis?(2) Clustering(cluster):Collection of data objects .Objects are similar in the same cluster(high intra-class similarity). Objects are different in different cluster(low inter-class similarity). Cluster Analysis Grouping the collection of physical or abstract objects into a process of multiple classes composed of similar objects. ATA 5 Copyright 2019 by Xiaoyu Li.Copyright © 2019 by Xiaoyu Li. 5  Clustering(cluster): Collection of data objects Objects are similar in the same cluster(high intra-class similarity). Objects are different in different cluster(low inter-class similarity).  Cluster Analysis Grouping the collection of physical or abstract objects into a process of multiple classes composed of similar objects. 1 What’s Cluster Analysis?(2)