Correlation of Attributes Based on Information Measure in DIS and Its Application to Attribute Reduction

The condition information measure of a decision attributes set w.r. t. to a condition attributes set is defined in a DIS. Based on the condition information measure the correlation of two condition attributes subsets w.r.t. a decision attributes set, the properties of correlation are discussed, and some concepts about DIS, such as necessary attribute, consistent attribute and attributes nuclear, etc, are described by using the correlation coefficient. By using the correlation of attributes a reduction algorithm is proposed, and an example is given to illustrate the algorithm is effective.

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