PDF格式的PPT，来自英国南安普顿大学。主要介绍了数据挖掘的技术以及应用，包括决策树，推荐系统，文本聚类，搜索引擎，购物篮子分析。-PPT PDF format, the University of Southampton. It introduces data mining technology and applications, including decision, recommendation systems, text clustering, search engines, sho

层次聚类分析也称系统聚类法或分级聚类法，是实际工作中采用最多的方法之一-Hierarchical cluster analysis, also known as system clustering or hierarchical clustering method, is one of the most used methods in practical work.