Data is inferred as a variable size matrix, while its properties in the Model Explorer specify its size as inherited or fixed. Please check the 'Variable Size' check

Question

Alexi 2023-1-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1899160-data-is-inferred-as-a-variable-size-matrix-while-its-properties-in-the-model-explorer-specify-its-s

评论： Alexi 2023-1-27

采纳的回答： Gowthami

While I do not get the error in the m file, I am getting it in simulink. How can I fix the error. Thank you.

uk=zeros(1,m*ni);

ns=1;

nb=1;

for n=1:1:m*ni

uk(n)=-w0*cos(gama(nb))+ (w1-k1*w0)*cos(gama(nb)) * (ef*cosd(Azi(nb))+seg_mid(ns)*cosd(Azi(nb)+omega(nb))) + ((D_ws+K1_y*D_w0)*cos(gama(nb))) * (ef*sind(Azi(nb))+seg_mid(ns)*sind(Azi(nb)+omega(nb)));

if ns==m

nb=nb+1;

ns=0;

end

ns=ns+1;

end

u=uk;

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Answer 1

Gowthami 2023-1-27

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https://ww2.mathworks.cn/matlabcentral/answers/1899160-data-is-inferred-as-a-variable-size-matrix-while-its-properties-in-the-model-explorer-specify-its-s#answer_1157390

Hi,

It is my understanding that you are facing an issue with the 'Variable Size' in the Simulink model.

I recommend you perform the following changes in the Simulink model:

1. Enable the 'Variable size' checkbox for the output variable in the property inspector.

2. Change the sample time for the scope to discrete to support the variable size signal.

More information on setting the general variable properties - https://www.mathworks.com/help/simulink/ug/_bqlblru.html#bqona5_

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Alexi 2023-1-27

Thank you for your answer, but I have identified where the error is coming from. The reason for the error is that I understood that the parameters that determine the limit of the for value in the simulink math function must be defined in the math function. I've observed that if I don't recognize this value as function inputs, I keep getting errors.

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