error in s function

Question

mina ahmadi 2015-7-8

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/229134-error-in-s-function

评论： Walter Roberson 2022-5-11

在 MATLAB Online 中打开

Hello, I have problem with s-function of fuzzy type 2

I setup fuzzy type 2 toolbox on matlab 2013a

But I have this error after run my simulink :

Error in 'auto/Subsystem/S-Function'

while executing MATLAB S-function 'fuzzy2sfunction', flag = 0 (initialize), at start of simulation.

Caused by:

Attempt to reference field of non-structure array.

---------------------------------------------

And this is s-function :

function [sys,x0,str,ts] = fuzzy2sfunction(t,x,u,flag,fis)
%TIMESTWO S-function whose output is two times its input.
%   This M-file illustrates how to construct an M-file S-function that
%   computes an output value based upon its input.  The output of this
%   S-function is two times the input value:
%
%     y = 2 * u;
%
%   See sfuntmpl.m for a general S-function template.
%
%   See also SFUNTMPL.
%   Copyright (c) 1990-1998 by The MathWorks, Inc. All Rights Reserved.
%   $Revision: 1.3 $
%
% Dispatch the flag. The switch function controls the calls to 
% S-function routines at each simulation stage of the S-function.
%
switch flag,
  %%%%%%%%%%%%%%%%%%
  % Initialization %
  %%%%%%%%%%%%%%%%%%
  % Initialize the states, sample times, and state ordering strings.
  case 0
    [sys,x0,str,ts]=mdlInitializeSizes(fis);
    %%%%%%%%%%%
    % Outputs %
    %%%%%%%%%%%
    % Return the outputs of the S-function block.
    case 3
      sys=mdlOutputs(t,x,u,fis);
    %%%%%%%%%%%%%%%%%%%
    % Unhandled flags %
    %%%%%%%%%%%%%%%%%%%
    % There are no termination tasks (flag=9) to be handled.
    % Also, there are no continuous or discrete states,
    % so flags 1,2, and 4 are not used, so return an emptyu
    % matrix 
    case { 1, 2, 4, 9 }
      sys=[];
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    % Unexpected flags (error handling)%
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    % Return an error message for unhandled flag values.
    otherwise
      error(['Unhandled flag = ',num2str(flag)]);
end
% end timestwo
%
%=============================================================================
% mdlInitializeSizes
% Return the sizes, initial conditions, and sample times for the S-function.
%=============================================================================
%
function [sys,x0,str,ts] = mdlInitializeSizes(fis)
% Call function simsizes to create the sizes structure.
sizes = simsizes;
% Load the sizes structure with the initialization information.
%sistembil=readfis2('fis');
NumInputs=length(fis.input);
NumOutputs=length(fis.output);
sizes.NumContStates= 0;
sizes.NumDiscStates= 0;
sizes.NumOutputs= NumOutputs;
sizes.NumInputs= NumInputs;
sizes.DirFeedthrough=1;
sizes.NumSampleTimes=1;
% Load the sys vector with the sizes information.
sys = simsizes(sizes);
%
x0 = []; % No continuous states
%
str = []; % No state ordering
%
ts = [-1 0]; % Inherited sample time
% End of mdlInitializeSizes.
%sistembil=readfis2('fisbilgi');
%NumInputs=length(sistembil.input);
%NumOutputs=length(sistembil.output);
% end mdlInitializeSizes
%
%=============================================================================
% mdlOutputs
% Return the output vector for the S-function
%=============================================================================
%
function sys = mdlOutputs(t,x,u,fis)
% sys = u * 2;
% yazi=num2str(u,2);
% u=str2num(yazi);
% u';
sys=ruleview2guisiz(u',fis);
%  end mdlOutputs