Optimal Bayesian estimation for random dot product graphs
Optimal Bayesian estimation for random dot product graphs
复制标题
随机点积图的最优贝叶斯估计
DOI:
10.1093/biomet/asaa031
复制
发表时间:
2020
期刊:
影响因子:
2.7
通讯作者:
Xu, Yanxun
中科院分区:
文献类型:
--
作者:
Xie, Fangzheng;Xu, Yanxun
We propose and prove the optimality of a Bayesian approach for estimating the latent positions in random dot product graphs, which we call posterior spectral embedding. Unlike classical spectral-based adjacency, or Laplacian spectral embedding, posterior spectral embedding is a fully likelihood-based graph estimation method that takes advantage of the Bernoulli likelihood information of the observed adjacency matrix. We develop a minimax lower bound for estimating the latent positions, and show that posterior spectral embedding achieves this lower bound in the following two senses: it both results in a minimax-optimal posterior contraction rate and yields a point estimator achieving the minimax risk asymptotically. The convergence results are subsequently applied to clustering in stochastic block models with positive semidefinite block probability matrices, strengthening an existing result concerning the number of misclustered vertices. We also study a spectral-based Gaussian spectral embedding as a natural Bayesian analogue of adjacency spectral embedding, but the resulting posterior contraction rate is suboptimal by an extra logarithmic factor. The practical performance of the proposed methodology is illustrated through extensive synthetic examples and the analysis of Wikipedia graph data.
登录
查看更多内容
DOI:
--
发表时间:
2017-09
期刊:
J. Mach. Learn. Res.
影响因子:
--
作者:
A. Athreya;D. E. Fishkind;M. Tang;C. Priebe;Youngser Park;J. Vogelstein;Keith D. Levin;V. Lyzinski;Yichen Qin;D. Sussman
通讯作者:
A. Athreya;D. E. Fishkind;M. Tang;C. Priebe;Youngser Park;J. Vogelstein;Keith D. Levin;V. Lyzinski;Yichen Qin;D. Sussman
影响因子:
6
作者:
Zhuo, Bumeng;Gao, Chao
通讯作者:
Gao, Chao
影响因子:
4.4
作者:
S. V. D. Pas;A. Vaart
通讯作者:
A. Vaart
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
C. Priebe;Youngser Park;M. Tang;A. Athreya;V. Lyzinski;J. Vogelstein;Yichen Qin;Benjamin T. Cocanougher;K. Eichler;Marta Zlatic;Albert Cardona
通讯作者:
Albert Cardona
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
Keith D. Levin;A. Athreya;M. Tang;V. Lyzinski;Youngser Park;C. Priebe
通讯作者:
C. Priebe