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Nonlinear Shrinkage: An Introduction
July 18, 2022, 9:45 p.m. | Jeffrey Näf
Towards Data Science - Medium towardsdatascience.com
High Dimensional Statistics
Optimal covariance matrix estimation in high dimensions
Many applications in statistics, machine learning, and other areas such as finance and biology, need an accurate estimate of a covariance matrix. However, nowadays many of these applications involve high dimensional data and so the usual (sample) covariance estimator just doesn’t cut it anymore. Thus a myriad of papers over the last two decades have been trying to tackle exactly this problem. An extremely powerful method that has emerged from …
covariance-matrix editors pick high-dimensional-data introduction machine learning shrinkage
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