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The problem of evaluating node importance in clustering has been active research in present days and many methods have been developed. Most of the clustering algorithms deal with general similarity measures. However In real situation most of the cases data changes over time. But clustering this type of data not only decreases the quality of clusters but also disregards the expectation of users, when usually require recent clustering results. In this regard we proposed OurNIR method that is better than MingSyan Chen proposed a method and it has proven with the help of results of node importance, which is related to calculate the node importance that is very useful in clustering of categorical data, still it has deficiency that is importance of data labeling and outlier detection. In this paper we modified OurNIR method for evaluating of node importance by introducing the probability distribution which will be better than by comparing the results.
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