arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1106.2229stat.MLcs.IRstat.AP
收藏

使用Baire度量的快速线性时间层次聚类

Fast, Linear Time Hierarchical Clustering using the Baire Metric

Pedro Contreras, Fionn Murtagh

摘要:

与标准的二次时间凝聚层次聚类算法相比,Baire度量在数据集上诱导了一个超度量,并且具有线性计算复杂度。在这项工作中,我们经验评估这种新的方法,层次聚类。我们比较基于Baire度量的层次聚类与(i)凝聚层次聚类,在算法属性方面;(ii)广义超度量,在定义方面;和(iii)快速聚类通过k-均值分割,在结果质量方面。对于后者,我们进行了深入的天文研究。在这项工作中,我们将贝尔距离应用于斯隆数字巡天的光谱和光度红移,使用了大约50万个天文物体。我们想知道(确定成本更高)光谱红移可以预测(更容易获得)光度红移的程度,即我们寻求对光度红移进行光谱回归,并且我们为此使用集群回归。

英文摘要:

The Baire metric induces an ultrametric on a dataset and is of linear computational complexity, contrasted with the standard quadratic time agglomerative hierarchical clustering algorithm. In this work we evaluate empirically this new approach to hierarchical clustering. We compare hierarchical clustering based on the Baire metric with (i) agglomerative hierarchical clustering, in terms of algorithm properties; (ii) generalized ultrametrics, in terms of definition; and (iii) fast clustering through k-means partititioning, in terms of quality of results. For the latter, we carry out an in depth astronomical study. We apply the Baire distance to spectrometric and photometric redshifts from the Sloan Digital Sky Survey using, in this work, about half a million astronomical objects. We want to know how well the (more costly to determine) spectrometric redshifts can predict the (more easily obtained) photometric redshifts, i.e. we seek to regress the spectrometric on the photometric redshifts, and we use clusterwise regression for this.

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。

↑