This article proposes the new criterion called as similar coefficient of cluster (SCC) toevaluate the similarity of probability density functions (pdfs). SCC is considered as astandard measure with value between 0 and 1. It is also used as the criterion to establishthe cluster for pdfs. Some theoretical results about determination SCC in case of two andmore than two pdfs, the relation between different SCC, the relations between SCC andother measures are also presented in this article. The numerical examples in both syntheticdata and real data not only illustrate the suitability of proposed theories and algorithmsbut also demonstrate the applicability and advantage of the proposed algorithm.
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