关键词: Vague集, 直接聚类法, 编网法, 最大树法

Abstract: Vague sets are the extend of Fuzzy sets.Some methods to construct vague similar matrices are given.The method of draw up web and the max tree method are introduced to vague sets.The concept of graph of vague relations based on the methods are presented，and the direct clustering methods based on vague sets are also given，they are method of draw up web and max tree method.Finally，using the example appeared in [1]，vague transfer closure method and the vague direct clustering method are used to calculate respectively.The experimental results show that the vague direct clustering method is easy，not causing distortion of the original information，and is more effective than vague transfer closure method.

Key words: vague sets, direct clustering method, method of draw up web, max tree method