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- W3037652308 abstract "The goal of this thesis is to modify projection pursuit by trading accuracy for interpretability. The modification produces a more parsimonious and understandable model without sacrificing the structure which projection pursuit seeks. The method retains the nonlinear versatility of projection pursuit while clarifying the results. Following an introduction which outlines the dissertation, the first and second chapters contain the technique as applied to exploratory projection pursuit and projection pursuit regression respectively. The interpretability of a description is measured as the simplicity of the coefficients which define its linear projections. Several interpretability indices for a set of vectors are defined based on the ideas of rotation in factor analysis and entropy. The two models require slightly different indices due to their contrary goals. A roughness penalty weighting approach is used to search for a more parsimonious description, with interpretability replacing smoothness. The computational algorithms for both interpretable exploratory projection pursuit and interpretable projection pursuit regression are described. In the former case, a rotationally invariant projection index is needed and defined. In the latter, alterations in the original algorithm are required. Examples of real data are considered in each situation. The third chapter deals with the connections between the proposed modification and other ideas which seek to produce more interpretable models." @default.
- W3037652308 created "2020-07-02" @default.
- W3037652308 creator A5008535622 @default.
- W3037652308 date "1989-10-01" @default.
- W3037652308 modified "2023-09-23" @default.
- W3037652308 title "Interpretable projection pursuit" @default.
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- W3037652308 doi "https://doi.org/10.2172/5005529" @default.
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