function f = fuz_sire(f1)% f=fuz_sire(f1)%% Sign reversal of a fuzzy number or interval.%% f1 = f = [xmin xmax m n alpha beta]  %% The sign reversal is a reflection at the ordinate. % ymin=0 and ymax=1 and L=R .% % f = [xmin, xmax, -n, -m, beta, alpha]%% FSTB - Fuzzy Systems Toolbox for MATLAB% Copyright (c) 1993-1996 by Olaf Wolkenhauer% Control Systems Centre at UMIST% Manchester M60 1QD, UK%% 8-Feb-1994 m = f1(3); n = f1(4); alpha = f1(5); beta = f1(6);f(1) = f1(1); f(2) = f1(2); f(3) = -n; f(4) = -m; f(5) = beta; f(6) = alpha;