相似性划分，Q型聚类，是理想的多变量统计技术，主要有分层聚类法和迭代聚类法。 聚类分析也称群分析、点群分析，是研究分类的一种多元统计方法。(Similarity classification and Q clustering are ideal multivariate statistical techniques, including hierarchical clustering and iterative clustering. Cluster analysis, also known as group analysis and point group analysis, is a multivariate statistical method for classification.)