Research on the group clustering method based on vector space

By analyzing the thinking pattern of group members, the general norm of relativity measurement of preference vectors of any two members in the group and the heuristic algorithm based on this vector relativity degree are put forward based on vector space. With the algorithm, several different clusters are formed in the group. On this basis, the preferences of every cluster of the group and the preference of the entire group, as well as the coherence indexes of every cluster of the group and the coherence index of the entire group are defined and calculated, which provides the basis for group decision. Finally, the algorithm and coherence indexes proposed are validated by an example.