A Novel Strategy for Minimum Attribute Reduction Based on Rough Set Theory and Fish Swarm Algorithm

Algorithm 2

RFSA-RST(DS).

Input: .

Output:

begin

  ; Calculate and ;

  if ,

   , output and terminate process;

  else

   ; ; ;

   repeat

    ; ;

    Get randomly;

    repeat

     ;

     for to

      Calculate by Algorithm 1; ;

      Calculate for the permutation by Eq (14).

      if

      else

       ;

      end

     end

      ; ;

     Implement swarming behavior, following behavior

     and preying behavior.

    until change 0.001;

   until ;

   return ;

  end

end