Search Results for author: Michael Weylandt

Found 10 papers, 2 papers with code

To the Fairness Frontier and Beyond: Identifying, Quantifying, and Optimizing the Fairness-Accuracy Pareto Frontier

no code implementations31 May 2022 Camille Olivia Little, Michael Weylandt, Genevera I Allen

Specifically, we identify and outline the empirical Pareto frontier through Tradeoff-between-Fairness-and-Accuracy (TAF) Curves; we then develop a metric to quantify this Pareto frontier through the weighted area under the TAF Curve which we term the Fairness-Area-Under-the-Curve (FAUC).

Fairness

Multivariate Analysis for Multiple Network Data via Semi-Symmetric Tensor PCA

no code implementations9 Feb 2022 Michael Weylandt, George Michailidis

Remarkably, we show that SS-TPCA achieves the same estimation accuracy as classical matrix PCA, with error proportional to the square root of the number of vertices in the network and not the number of edges as might be expected.

Dimensionality Reduction Tensor Decomposition

Sparse Partial Least Squares for Coarse Noisy Graph Alignment

no code implementations6 Apr 2021 Michael Weylandt, George Michailidis, T. Mitchell Roddenberry

Graph signal processing (GSP) provides a powerful framework for analyzing signals arising in a variety of domains.

Simultaneous Grouping and Denoising via Sparse Convex Wavelet Clustering

no code implementations8 Dec 2020 Michael Weylandt, T. Mitchell Roddenberry, Genevera I. Allen

In contrast to common practice which denoises then clusters, our method is a unified, convex approach that performs both simultaneously.

Clustering Data Compression +1

Automatic Registration and Clustering of Time Series

no code implementations8 Dec 2020 Michael Weylandt, George Michailidis

Clustering of time series data exhibits a number of challenges not present in other settings, notably the problem of registration (alignment) of observed signals.

Clustering Time Series +1

Multi-Rank Sparse and Functional PCA: Manifold Optimization and Iterative Deflation Techniques

no code implementations28 Jul 2019 Michael Weylandt

We first propose an extension of SFPCA which estimates several principal components simultaneously using manifold optimization techniques to enforce orthogonality constraints.

Splitting Methods for Convex Bi-Clustering and Co-Clustering

no code implementations18 Jan 2019 Michael Weylandt

Co-Clustering, the problem of simultaneously identifying clusters across multiple aspects of a data set, is a natural generalization of clustering to higher-order structured data.

Clustering

Dynamic Visualization and Fast Computation for Convex Clustering via Algorithmic Regularization

1 code implementation6 Jan 2019 Michael Weylandt, John Nagorski, Genevera I. Allen

Convex clustering is a promising new approach to the classical problem of clustering, combining strong performance in empirical studies with rigorous theoretical foundations.

Clustering

Sparse and Functional Principal Components Analysis

1 code implementation11 Sep 2013 Genevera I. Allen, Michael Weylandt

We propose a unified approach to regularized PCA which can induce both sparsity and smoothness in both the row and column principal components.

Dimensionality Reduction EEG +1

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