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arXiv 2108.08003cs.LG
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随机聚类嵌入

Stochastic Cluster Embedding

Norwegian University of Science and Technology(挪威科技大学);Aalto University(阿尔托大学);Finnish Geospatial Research Institute(芬兰地理空间研究所);University of Oslo(奥斯陆大学);Wellcome Sanger Institute(威康桑格研究所);University of Helsinki(赫尔辛基大学)

Zhirong Yang, Yuwei Chen, Denis Sedov, Samuel Kaski, Jukka Corander

摘要:

邻域嵌入(NE)旨在保持数据项之间的成对相似性,并已被证明是数据可视化的有效原则。然而,即使是现有的最好的NE方法,如随机邻居嵌入(SNE),也可能隐藏大规模的模式,例如集群,尽管数据中存在强信号。为了解决这个问题,我们提出了一个新的集群可视化方法的基础上的邻居嵌入原则。首先,我们提出了一个家庭的邻居嵌入方法,通过使用非归一化的Kullback-Leibler散度与尺度参数,概括SNE。在这个系列中,更好的聚类可视化通常会出现与SNE对应的参数值不同的参数值。我们还开发了一个高效的软件,采用异步随机块坐标下降优化新的家庭的目标函数。我们的实验结果表明,该方法一致,并大大提高了可视化的数据集群相比,国家的最先进的NE方法。

英文摘要:

Neighbor Embedding (NE) aims to preserve pairwise similarities between data items and has been shown to yield an effective principle for data visualization. However, even the best existing NE methods such as Stochastic Neighbor Embedding (SNE) may leave large-scale patterns hidden, for example clusters, despite strong signals being present in the data. To address this, we propose a new cluster visualization method based on the Neighbor Embedding principle. We first present a family of Neighbor Embedding methods that generalizes SNE by using non-normalized Kullback-Leibler divergence with a scale parameter. In this family, much better cluster visualizations often appear with a parameter value different from the one corresponding to SNE. We also develop an efficient software that employs asynchronous stochastic block coordinate descent to optimize the new family of objective functions. Our experimental results demonstrate that the method consistently and substantially improves the visualization of data clusters compared with the state-of-the-art NE approaches.

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