Lassoing eigenvalues
Lassoing eigenvalues
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DOI:
10.1093/biomet/asz076
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发表时间:
2018-05
期刊:
影响因子:
2.7
通讯作者:
David E. Tyler;Mengxi Yi
中科院分区:
文献类型:
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作者:
David E. Tyler;Mengxi Yi
The properties of penalized sample covariance matrices depend on the choice of the penalty function. In this paper, we introduce a class of nonsmooth penalty functions for the sample covariance matrix and demonstrate how their use results in a grouping of the estimated eigenvalues. We refer to the proposed method as lassoing eigenvalues, or the elasso.