Matlab function undefined variable error

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Ahmad Badran 2020-10-2

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/603673-matlab-function-undefined-variable-error

评论： Ameer Hamza 2020-10-2

采纳的回答： Ameer Hamza

Hi i have used matlab function in simulation and the function equation is

function y = ks(u)

y = u*lo;

end

I have difined lo in m.file at the same name of the function "ks"

lo=5;

evry time i eun the simulation i got error "Undefined function or variable 'lo'."

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采纳的回答

Ameer Hamza 2020-10-2

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Define lo inside the function

function y = ks(u)
    lo = 5;
    y = u*lo;
end

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Ahmad Badran 2020-10-2

I have tried to make lo as a global but this also does not effevt

Ameer Hamza 2020-10-2

I got the impression that OP is referring to Simulink's MATLAB function block. There are ways to share data from the base workspace, but the easiest is just to define it inside the function block.

https://www.mathworks.com/help/simulink/ug/using-global-data-with-the-matlab-function-block.html

https://www.mathworks.com/help/simulink/ug/parameter-arguments-in-matlab-function-block-functions.html

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