get_msd.m

来自「FISMAT accommodates different arithmetic」· M 代码 · 共 28 行

function msd = get_msd(U,msf,u)

% msd = get_msd(U,msf,u)
%
% Determines the degree of membership msd of the value u in the universe
% of discourse U. U and the membership function msf are given as finite
% vectors.
% If the value u is smaller than the smallest value in U, msd is set to
% be equal to the msf of the first value in U.
% If the value u is greater than the largest value in U, msd is set to
% be equal to the msf of the last value in U.
% If U(1) <= u <= U(length(U)) the msf is interpolated.
%
% FSTB - Fuzzy Systems Toolbox for MATLAB
% Copyright (c) 1993-1996 by Olaf Wolkenhauer
% Control Systems Centre at UMIST
% Manchester M60 1QD, UK
%
% 29 Jan 1996

if u < U(1),
  msd = msf(1);
elseif u > U(length(U)),
  msd = msf(length(U));
else
  msd = interp1(U,msf,u);
end;