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Orthogonal decision trees

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3 Author(s)
Kargupta, H. ; Dept. of Comput. Sci. & Electr. Eng., Maryland Univ., Baltimore, MD ; Byung-Hoon Park ; Dutta, H.

This paper introduces orthogonal decision trees that offer an effective way to construct a redundancy-free, accurate, and meaningful representation of large decision-tree-ensembles often created by popular techniques such as bagging, boosting, random forests, and many distributed and data stream mining algorithms. Orthogonal decision trees are functionally orthogonal to each other and they correspond to the principal components of the underlying function space. This paper offers a technique to construct such trees based on the Fourier transformation of decision trees and eigen-analysis of the ensemble in the Fourier representation. It offers experimental results to document the performance of orthogonal trees on the grounds of accuracy and model complexity

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Knowledge and Data Engineering, IEEE Transactions on  (Volume:18 ,  Issue: 8 )