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The information granulation in discretization

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4 Author(s)
Li-Hong Wang ; Sch. of Comput. Sci. and Technol., Shanghai Univ., China ; Shu-Cui Zhang ; Hui Fan ; Geng-Feng Wu

Discretization is a vehicle of abstraction that supports a conversion of clouds of numeric data into more tangible information granules, which can be represented as hyper-boxes in R". A partial ordering of all discretization schemes for a given information table is defined to describe the relative granularity. All discretized tables form a hierarchical structure, representing the information table under different granulation. The granule-based entropy is defined to measure the information change in discretization. With meet and join operations, the partially ordered set becomes a lattice named discretization lattice, which is a Boolean algebra.

Published in:

Machine Learning and Cybernetics, 2003 International Conference on  (Volume:5 )

Date of Conference:

2-5 Nov. 2003