Error: The sample time for any variable-size signal must be discrete

Hi,

I have the following code within the MATLAB Function Block Editor (in the Matlab function found in the user-defined library in simulink). The size of output y depends on the input u.

function y = fcn(u)
%#codegen

    assert(u<=10);
    y = zeros(1,u);
    for i = 1:u
       y(i) = 3;
    end

end

Also, in the Ports and Data Manager, I have also checked the Variable Size option for output y, and entered a size of 10 in the Size field.

However, running the simulation generated the error: The signal at input port 1 of 'untitled/Display' is a variable-size signal with a nondiscrete sample time. The sample time for any variable-size signal must be discrete.

May I know what is going on and how do I go about solving it? I would greatly appreciate any help or advice. Thanks in advance!

Answer 1

[S An]

Hi, I met this problem today. I solved it by creating a new blank "matlab function" in simulink and copying the code from the old one. Hope it's useful!

[Siva Shankar]

S An that was a silly answer.Hope it's not useful

Answer 2

[amal elkouche]

Hi S An, I also met this problem, can you tell me how can I connect the ports of the new matlab function with the model?

Thank you in advance

Answer 3

[mark]

https://stackoverflow.com/questions/62330895/error-in-all-sample-times-for-this-block-must-be-discrete-no-continuous-or-cons

This article answers this question.