Abstract
Logical analysis of data (LAD)is one of the methodologies for extracting knowledge as a Boolean function f from a given pair of data sets (T,F)on attributes set S of size n in whch T (resp.,F)0 , 1n denotes a set of positive (resp.,negative)examples for the phenomenon under cons deration.In this paper,we consider the case n which extracted knowledge has a decomposable structure;i.e.,f is described as aform f (x)=g(x[S0],h x[S1]))for some S0,S1 .S and Boolean functions g and h where x[I]denotes the projection of vector x on I In order to detect meaningful decomposable structures,it is expected that the sizes ∣T∣and ∣F∣ must be sufficiently large.In this paper,we provide an index for such indispensable number of examples,based on probabilistic analysis.Using p = ∣T ∣/ ∣T ∣+ ∣F ∣)and q = ∣F ∣/ ∣T ∣+ ∣F ∣),we claim that there exist many deceptive decomposable structures of (T,F) if ∣T + ∣F ∣≤√p n - 1 /pq The computat onal results on synthetically generated data sets show that the above index gives a good lower bound on the indispensable data size.
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Ono, H., Yagiura, M.u., Ibaraki, T. (2001). An Index for the Data Size to Extract Decomposable Structures in LAD. In: Eades, P., Takaoka, T. (eds) Algorithms and Computation. ISAAC 2001. Lecture Notes in Computer Science, vol 2223. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-45678-3_25
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DOI: https://doi.org/10.1007/3-540-45678-3_25
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