fuz_exp1.m

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

function f = fuz_exp1(f1)

% f=fuz_exp1(f1)
%
% Exponential function of a (LR-) fuzzy intervall (number).
% see fuz_exp() !
%
% f1 = [xmin xmax m n alpha beta] 
%
% ymin=0 und ymax=1 
%
% fuz_exp1 is called from fuz_exp .
%
% 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); alpha = f1(5);
n = f1(4); beta  = f1(6);

if fuz_sign(f1)==3;       % f1 not positive and not negative
  error('Error: (LR-) fuzzy-intervall (number) zero.fuz_inv impossible !');
end;

f(1) = f1(1);  f(2) = f1(2);             % xmin, xmax
f(3) = exp(m); f(4) = exp(n);            % m, n
f(5) = exp(m)*(1-exp(-alpha));           % alpha
f(6) = exp(n)*(exp(beta)-1);             % beta