Rough dependencies as a particular case of correlation: application to the calculation of approximative reducts

摘要

Rough Sets Theory provides a sound basis for the extraction of qualitative knowledge (dependencies) from very large relational databases.Dependencies may be expressed by means of formulas (implications) in the following way:{x_1,...,x_n}=>{y} where{x_1,...,x_n} are attributes that induce partitions into equivalence classes on the underlying population.