A Projection Pursuit Method on the multidimensional squared Contingency Table

Ju Ahn, Heike Hofmann and Dianne Cook

Computational Statistics, 2003, vol. 18, issue 3, 605-626

Abstract: In this study a projection pursuit method is used to explore c d (square) contingency table data. The method operates on projection matrices constructed from the contingency tables using affine geometry and creates projections (or marginals) using a Radon transform. The projection matrices and the projections can be used to find the “interesting” (nonuniform structure), and to cluster and to order the, cases. This projection pursuit method is implemented with graph visualization of projection. It is similar to the discrete version of Andrews’ curve. We demonstrate how this approach compares to association rules commonly used in data mining using a market basket data set and compare the PP results with the analysis of a data set from Wishart and Leach) (1970). Copyright Physica-Verlag 2003

Keywords: Projection pursuit; Projection matrix; Squared contingency table; Radon transform; Parallel class; Association rules; Data mining (search for similar items in EconPapers)
Date: 2003
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Persistent link: https://EconPapers.repec.org/RePEc:spr:compst:v:18:y:2003:i:3:p:605-626

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DOI: 10.1007/BF03354619

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