In this paper, based on the Minimum Different List （MDL） of the rough set theory, we build a Simple Different Matrix （SMD） which is similar to MDL using the incremental representation. From the approximate reduction set of SDM, we implement the forward selection of the attribute subspace. Finally, a hybrid feature selection algorithm based on the rough set theory has been proposed, and the result shows that the efficiency and accuracy of feature selection have been improved greatly by this approach. What is more, the ...
