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Automatic dimensionality selection from the scree plot via the use of profile likelihood. (English) Zbl 1157.62429
Summary: Most dimension reduction techniques produce ordered coordinates so that only the first few coordinates need be considered in subsequent analyses. The choice of how many coordinates to use is often made with a visual heuristic, i.e., by making a scree plot and looking for a “big gap” or an “elbow.” In this article, we present a simple and automatic procedure to accomplish this goal by maximizing a simple profile likelihood function. We give a wide variety of both simulated and real examples.

MSC:
62H25 Factor analysis and principal components; correspondence analysis
62H99 Multivariate analysis
Software:
ElemStatLearn; TMG
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References:
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