Search Results for author: Lucy L. Gao

Found 7 papers, 5 papers with code

Moreau Envelope Based Difference-of-weakly-Convex Reformulation and Algorithm for Bilevel Programs

no code implementations29 Jun 2023 Lucy L. Gao, Jane J. Ye, Haian Yin, Shangzhi Zeng, Jin Zhang

In a recent study by Ye et al. (2023), a value function-based difference of convex algorithm was introduced to address bilevel programs.

Generalized Data Thinning Using Sufficient Statistics

no code implementations22 Mar 2023 Ameer Dharamshi, Anna Neufeld, Keshav Motwani, Lucy L. Gao, Daniela Witten, Jacob Bien

A recent paper showed that for some well-known natural exponential families, $X$ can be "thinned" into independent random variables $X^{(1)}, \ldots, X^{(K)}$, such that $X = \sum_{k=1}^K X^{(k)}$.

Data thinning for convolution-closed distributions

1 code implementation18 Jan 2023 Anna Neufeld, Ameer Dharamshi, Lucy L. Gao, Daniela Witten

We propose data thinning, an approach for splitting an observation into two or more independent parts that sum to the original observation, and that follow the same distribution as the original observation, up to a (known) scaling of a parameter.

Model Selection

Tree-Values: selective inference for regression trees

1 code implementation15 Jun 2021 Anna C. Neufeld, Lucy L. Gao, Daniela M. Witten

A naive approach to inference that does not account for the fact that the tree was estimated from the data will not achieve standard guarantees, such as Type 1 error rate control and nominal coverage.

regression

Selective Inference for Hierarchical Clustering

2 code implementations5 Dec 2020 Lucy L. Gao, Jacob Bien, Daniela Witten

Classical tests for a difference in means control the type I error rate when the groups are defined a priori.

Clustering

Testing for Association in Multi-View Network Data

1 code implementation25 Sep 2019 Lucy L. Gao, Daniela Witten, Jacob Bien

To answer this question, we extend the stochastic block model for a single network view to the two-view setting, and develop a new hypothesis test for the null hypothesis that the latent community memberships in the two data views are independent.

Stochastic Block Model

Are Clusterings of Multiple Data Views Independent?

2 code implementations12 Jan 2019 Lucy L. Gao, Jacob Bien, Daniela Witten

However, clustering the participants based on multiple data views implicitly assumes that a single underlying clustering of the participants is shared across all data views.

Clustering

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