Combined Accelerator for Attribute Reduction: A Sample Perspective
Algorithm 2
Bucket-based forward greedy searching strategy for obtaining the reduct.
Inputs: Decision system , radius δ.
Outputs: An approximation quality reduct A.
(1)
Compute ;
(2)
;
(3)
Do(i), compute by using Definition 5 and Theorem 1;(ii)Compute the lower approximation based on by using equation (1);(iii), compute based on lower approximation, and then select b such that ;(iv);(v)Compute ;While ;