1 What's Cluster Analysis?(1) ·“物以类聚，人以群分” Birds of the same feather flock together. 口 口 The result of a cluster analysis shown as the coloring of the squares into three clusters. DATA 4 Copyright 2019 by Xiaoyu Li.Copyright © 2019 by Xiaoyu Li. 4 1 What’s Cluster Analysis?(1)  “物以类聚，人以群分”  Birds of the same feather flock together.  The result of a cluster analysis shown as the coloring of the squares into three clusters