Vector type output from MATLAB function in Simulink - Errors

Question

patr chri 2020-5-27

0
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https://ww2.mathworks.cn/matlabcentral/answers/535594-vector-type-output-from-matlab-function-in-simulink-errors

编辑： patr chri 2020-5-28

Hello all,

I have been trying to work out how to implement a vector of any size (1xn) with MATLAB functions in Simulink. For the purposes of this question, let's take a simple test model found in the attached image.

In the first MATLAB function, I have the following simple code:

function y = fcn(u)
if(u == 1)
    a = zeros(1,6);
    y = a;
end
end

In the second MATLAB function, I have the following code:

function k = fcn(u1)
if(u1(1) == 0)
    k = 2;
end
end

Based on answers on relative previous questions in the forum, I have the following settings regarding the variables in both MATLAB function:

However, I get the following errors when I try to run the model:

Output argument 'k' is not assigned on some execution paths.
Function 'MATLAB Function1' (#2181.9.10), line 1, column 10:
"k"
Launch diagnostic report.
Component:MATLAB Function | Category:Coder error
Errors occurred during parsing of MATLAB function 'untitled/MATLAB Function1'
Component:MATLAB Function | Category:Coder error
Output argument 'y' is not assigned on some execution paths.
Function 'MATLAB Function' (#2174.9.10), line 1, column 10:
"y"
Launch diagnostic report.
Component:MATLAB Function | Category:Coder error
Errors occurred during parsing of MATLAB function 'untitled/MATLAB Function'
Component:MATLAB Function | Category:Coder error
Errors occurred during parsing of MATLAB function 'untitled/MATLAB Function'
Component:Simulink | Category:Model error