[Retracted] Covering Fuzzy Rough Sets via Variable Precision

Algorithm 1

Algorithm for the presented drug selections.

	Input: the fuzzy decision matrix, the choice threshold, and the parameter.
	Output: decision-aking.
(1)Compute the lower and upper approximations by using Model 3
(2)Compute three deflections among drugs (i.e., , and )
(3)Compute three preference values among drugs (i.e., , and )
(4)Compute three overall preference indices among drugs (i.e., , and )
(5)Compute three leaving flows of drugs (i.e., , and )
(6)Compute three entering flows of drugs (i.e., , and )
(7)Compute the net flow of alternatives
(8)	Ranking the alternatives and obtain the decision