User-friendly covariance estimation for heavy-tailed distributions
We provide a survey of recent results on covariance estimation for heavy-tailed distributions.
By unifying ideas scattered in the literature, we propose user-friendly methods that facilitate …
By unifying ideas scattered in the literature, we propose user-friendly methods that facilitate …
Minimax estimation of Laplacian constrained precision matrices
J Ying, JV de Miranda Cardoso… - International …, 2021 - proceedings.mlr.press
This paper considers the problem of high-dimensional sparse precision matrix estimation
under Laplacian constraints. We prove that the Laplacian constraints bring favorable …
under Laplacian constraints. We prove that the Laplacian constraints bring favorable …
Estimating large precision matrices via modified Cholesky decomposition
We introduce a k-banded Cholesky prior for estimating high-dimensional bandable
precision matrices using a modified Cholesky decomposition. The bandable assumption is …
precision matrices using a modified Cholesky decomposition. The bandable assumption is …
Two‐Stage Estimation for Ultrahigh Dimensional Sparse Quadratic Discriminant Analysis
S Zhou, Y Huang, X Gao - Journal of Mathematics, 2024 - Wiley Online Library
The conventional Quadratic Discriminant Analysis (QDA) encounters a significant hurdle
due to parameter scaling complexities on the order of O (p2), rendering it impractical for the …
due to parameter scaling complexities on the order of O (p2), rendering it impractical for the …
Precision and Cholesky Factor Estimation for Gaussian Processes
J Chen, D Sanz-Alonso - arXiv preprint arXiv:2412.08820, 2024 - arxiv.org
This paper studies the estimation of large precision matrices and Cholesky factors obtained
by observing a Gaussian process at many locations. Under general assumptions on the …
by observing a Gaussian process at many locations. Under general assumptions on the …
Simultaneous inference in multiple matrix-variate graphs for high-dimensional neural recordings
As large-scale neural recordings become common, many neuroscientific investigations are
focused on identifying functional connectivity from spatio-temporal measurements in two or …
focused on identifying functional connectivity from spatio-temporal measurements in two or …
A Heavily Right Strategy for Integrating Dependent Studies in Any Dimension
Recently, there has been a surge of interest in hypothesis testing methods for combining
dependent studies without explicitly assessing their dependence. Among these, the Cauchy …
dependent studies without explicitly assessing their dependence. Among these, the Cauchy …
A new approach for ultrahigh dimensional precision matrix estimation
W Liang, Y Zhang, J Wang, Y Wu, X Ma - Journal of Statistical Planning and …, 2024 - Elsevier
The modified Cholesky decomposition (MCD) method is commonly used in precision matrix
estimation assuming that the random variables have a specified order. In this paper, we …
estimation assuming that the random variables have a specified order. In this paper, we …
A generative approach to modeling data with quantitative and qualitative responses
In many scientific areas, data with mixed quantitative and qualitative (QQ) responses are
commonly encountered with a large number of predictors. By exploring the association …
commonly encountered with a large number of predictors. By exploring the association …