fuz_sub.m

FISMAT accommodates different arithmetic operators, fuzzification and defuzzification algorithm, imp

function f = fuz_sub(f1,f2)

% f=fuz_sub(f1,f2)
%
% Subtraction of two fuzzy numbers/intervalls in LR representation.
% f1=f2=f = [xmin xmax m n alpha beta]
% ymin=0, ymax=1 and L=R.
% The substraction is a addition with sign reversal.
% f1-f2 = f1 + (-f2)
%
% f = [xmin, xmax, m1-n2, n1-m2, alpha1+beta2, beta1+alpha2]
%
% 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
 
m1 = f1(3); n1 = f1(4); alpha1 = f1(5); beta1 = f1(6);
m2 = f2(3); n2 = f2(4); alpha2 = f2(5); beta2 = f2(6);

f(1) = f1(1); f(2) = f1(2);        f(3) = m1-n2; 
f(4) = n1-m2; f(5) = alpha1+beta2; f(6) = beta1+alpha2;