MQL5 ReferenceStandard LibraryMathematicsFuzzy LogicMembership functionsCNormalMembershipFunctionB BSigmaGetValue B (Get method) Gets the membership function center. double B() Return Value The value of the membership function center. B (Set method) Sets the value of the membership function center. void B( const double b // function center value ) Parameters b [in] Value of the membership function center. CNormalMembershipFunction Sigma