ARCHETYPAL ANALYSIS

被引:376
作者
CUTLER, A [1 ]
BREIMAN, L [1 ]
机构
[1] UNIV CALIF BERKELEY,DEPT STAT,BERKELEY,CA 94720
关键词
ARCHETYPES; CONVEX HULL; GRAPHICS; NONLINEAR OPTIMIZATION; PRINCIPAL COMPONENTS;
D O I
10.2307/1269949
中图分类号
O21 [概率论与数理统计]; C8 [统计学];
学科分类号
020208 ; 070103 ; 0714 ;
摘要
Archetypal analysis represents each individual in a data set as a mixture of individuals of pure type or archetypes. The archetypes themselves are restricted to being mixtures of the individuals in the data set. Archetypes are selected by minimizing the squared error in representing each individual as a mixture of archetypes. The usefulness of archetypal analysis is illustrated on several data sets. Computing the archetypes is a nonlinear least squares problem, which is solved using an alternating minimizing algorithm.
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页码:338 / 347
页数:10
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