On Consistency and Sparsity for Principal Components Analysis in High Dimensions.
On Consistency and Sparsity for Principal Components Analysis in High Dimensions.
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DOI:
10.1198/jasa.2009.0121
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发表时间:
2009-06-01
影响因子:
3.7
通讯作者:
Lu AY
中科院分区:
文献类型:
--
作者:
Johnstone IM;Lu AY
Principal components analysis (PCA) is a classic method for the reduction of dimensionality of data in the form of n observations (or cases) of a vector with p variables. Contemporary datasets often have p comparable with or even much larger than n. Our main assertions, in such settings, are (a) that some initial reduction in dimensionality is desirable before applying any PCA-type search for principal modes, and (b) the initial reduction in dimensionality is best achieved by working in a basis in which the signals have a sparse representation. We describe a simple asymptotic model in which the estimate of the leading principal component vector via standard PCA is consistent if and only if p(n)/n→0. We provide a simple algorithm for selecting a subset of coordinates with largest sample variances, and show that if PCA is done on the selected subset, then consistency is recovered, even if p(n) ⪢ n.
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影响因子:
10.2
作者:
d'Aspremont, Alexandre;El Ghaoui, Laurent;Lanckriet, Gert R. G.
通讯作者:
Lanckriet, Gert R. G.
DOI:
10.1088/0305-4470/27/6/015
发表时间:
1994-03-21
期刊:
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL
影响因子:
--
作者:
BIEHL, M;MIETZNER, A
通讯作者:
MIETZNER, A
影响因子:
4.5
作者:
Nadler, Boaz
通讯作者:
Nadler, Boaz
影响因子:
--
作者:
ANDERSON, TW
通讯作者:
ANDERSON, TW
DOI:
10.1088/0305-4470/29/13/021
发表时间:
1996-07-07
期刊:
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL
影响因子:
--
作者:
Reimann, P;VandenBroeck, C;Bex, GJ
通讯作者:
Bex, GJ