Why do I get the error "Unbalanced or unexpected parenthesis or bracket?"

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성주 김 2023-5-1

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https://ww2.mathworks.cn/matlabcentral/answers/1955759-why-do-i-get-the-error-unbalanced-or-unexpected-parenthesis-or-bracket

编辑： Steven Lord 2023-5-1

I wrote an electrical capacitor code for importing to the simscape component from the simulink and proceeded with the compile, and an error such as "Unbalanced or unexpected parenthesis or bracket."

The following is a rough structure of the code I used.

component mycapacitor < foundation.electrical.electrical
parameters
A[7] = {560 , 320, 6690,9400,3400,9600,6700} ;
B[7] = {1.09, 1.14, 1.57, 4.75, 2.02, 1.041, 6.00}; 
end
variables
vc = {value = { 0, 'V' }, priority = priority.high}; % Capacitor voltage
end
intermediates
power_dissipated = r*i^2+g*vc^2; 
end
equations
assert(c>0)
assert(g>=0)
assert(isfinite(g))
assert(r>=0)
assert(isfinite(r))
for i = 1:m
    v == i*A[i] + vc*B[i];
    i == c*vc.der + g*vc;
end
end

[SL: Formatted code as code.]

An error occurred in A[7] and B[7] of the above code. The language is known based on the modelica code. I used most of the array methods in the modelica code, but I got the same error. What's the problem??

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Luca Ferro 2023-5-1

编辑：Luca Ferro 2023-5-1

I don't understand if you want help on modelica code or to convert it in matlab code

성주 김 2023-5-1

Thank you for your question. To use the simscape component block, import the ssc file and proceed with the compilation. At this time, it should be written based on the modelica code, so I think I should get help with the modelica code.

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Answer 1

Walter Roberson 2023-5-1

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https://ww2.mathworks.cn/matlabcentral/answers/1955759-why-do-i-get-the-error-unbalanced-or-unexpected-parenthesis-or-bracket#answer_1226514

As far as I can see, Simscape uses () for indexing, not []

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성주 김 2023-5-1

Thank you for your reply. As a result of changing to A[7] -> A(7) reflecting your advice, the same error occurred. Is there any other way?? I would appreciate it if you could give me an answer.

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