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arXiv 1304.6478cs.LGstat.MEstat.ML
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聚类的K-modes算法

The K-modes algorithm for clustering

University of California, Merced(加州大学默塞德分校)

Miguel Á. Carreira-Perpiñán, Weiran Wang

摘要:

存在许多估计聚类中心的聚类算法,例如K-means,K-medoids或mean-shift,但似乎不存在通过返回恰好K个有意义的模式来聚类数据的算法。我们提出了一个自然的K-模式的目标函数的定义,结合密度和集群分配的概念。该算法在极大尺度和极小尺度的极限下分别成为K-means和K-medoids。在计算上,它比K-means稍慢,但比mean-shift或K-medoids快得多。与K-means不同,它能够找到有效模式的质心,真正代表一个集群,即使是非凸集群,并且对离群值和集群规模和数量的错误指定具有鲁棒性。

英文摘要:

Many clustering algorithms exist that estimate a cluster centroid, such as K-means, K-medoids or mean-shift, but no algorithm seems to exist that clusters data by returning exactly K meaningful modes. We propose a natural definition of a K-modes objective function by combining the notions of density and cluster assignment. The algorithm becomes K-means and K-medoids in the limit of very large and very small scales. Computationally, it is slightly slower than K-means but much faster than mean-shift or K-medoids. Unlike K-means, it is able to find centroids that are valid patterns, truly representative of a cluster, even with nonconvex clusters, and appears robust to outliers and misspecification of the scale and number of clusters.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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