An Algorithm for Discretization of Condition Attributesin Rough Set Theory

The discretization of quantitative attributes is the critical factor that limits the application of rough set theory. In this paper, using grade classification method and the concept of dependency degree, an algorithm is presented for discretization of condition attributes in a decision system. Furthermore, attribute reduction can be achieved by using the algorithm. The algorithm is constructed with good understandability and simple computation. In the end, an example illustrates that the algorithm is reasonable and effective.