arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.07995cs.LGcs.CVstat.ML
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再论集聚集群

Revisiting Agglomerative Clustering

University of São Paulo(圣保罗大学);Federal University of São Carlos(圣卡洛斯联邦大学)

Eric K. Tokuda, Cesar H. Comin, Luciano da F. Costa

摘要:

聚类中的一个重要问题是在搜索聚类时避免误报。这项工作解决了这个问题,考虑凝聚的方法,即单一的,平均值,中位数,完整的,质心和沃德的方法适用于单峰和双峰数据集服从均匀,高斯,指数和幂律分布。还采用了一个集群模型,涉及一个高密度的核心周围的过渡,其次是离群值。这为确定从树状图中识别聚类的客观方法铺平了道路。所采用的模型还允许根据其子树的高度来量化聚类的相关性。得到的结果包括验证,许多方法检测两个类的单峰数据。发现单连接方法对假阳性更有弹性。此外,有几种方法检测到不直接对应于细胞核的簇。还研究了确定分布类型的可能性。

英文摘要:

An important issue in clustering concerns the avoidance of false positives while searching for clusters. This work addressed this problem considering agglomerative methods, namely single, average, median, complete, centroid and Ward's approaches applied to unimodal and bimodal datasets obeying uniform, gaussian, exponential and power-law distributions. A model of clusters was also adopted, involving a higher density nucleus surrounded by a transition, followed by outliers. This paved the way to defining an objective means for identifying the clusters from dendrograms. The adopted model also allowed the relevance of the clusters to be quantified in terms of the height of their subtrees. The obtained results include the verification that many methods detect two clusters in unimodal data. The single-linkage method was found to be more resilient to false positives. Also, several methods detected clusters not corresponding directly to the nucleus. The possibility of identifying the type of distribution was also investigated.

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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