arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1102.2075stat.MLcs.DS
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图聚类方法的结果如何取决于图的构造

How the result of graph clustering methods depends on the construction of the graph

Markus Maier, Ulrike von Luxburg, Matthias Hein

摘要:

我们研究的情况下,基于图的聚类算法,如谱聚类。给定一组数据点,首先必须在数据点上构建一个图,然后应用图聚类算法来找到图的合适分区。我们的主要问题是图的构造(图的选择、参数的选择、权重的选择)是否以及如何影响最终聚类结果的结果。为此,我们研究了当样本量趋于无穷大时,各种随机几何图上的聚类质量度量(如归一化割或Cheeger割)的收敛性。事实证明,同一目标函数的极限值在不同类型的图上是系统不同的。这意味着聚类结果系统地依赖于图,并且对于不同类型的图可能非常不同。我们提供的例子来说明谱聚类的影响。

英文摘要:

We study the scenario of graph-based clustering algorithms such as spectral clustering. Given a set of data points, one first has to construct a graph on the data points and then apply a graph clustering algorithm to find a suitable partition of the graph. Our main question is if and how the construction of the graph (choice of the graph, choice of parameters, choice of weights) influences the outcome of the final clustering result. To this end we study the convergence of cluster quality measures such as the normalized cut or the Cheeger cut on various kinds of random geometric graphs as the sample size tends to infinity. It turns out that the limit values of the same objective function are systematically different on different types of graphs. This implies that clustering results systematically depend on the graph and can be very different for different types of graph. We provide examples to illustrate the implications on spectral clustering.

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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