5.2 BayeS’ theorem 183
We will begin by defining some of the main concepts of rough sets and
Bayes’ in the next few sections. These theories are then applied to the fol-
lowing four application areas to discover useful information:
Customer purchase data (Using Bayes’ theory)1.
Fitting contact lenses (Using rough-set theory)2.
Welding procedures (Using rough-set theory)3.
Car data (Using Bayes’ and rough-set theories)4.
In the above examples, the datasets are composed of condition and deci-
sion parts. In the condition part, each object is described in terms of condi-
tion attributes, and the decision part specifies generated results that can be
used for effective decision making. Normally, it is not easy to determine
what portion of data ...