Error: variable might be used before it is defined.
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kindly check screenshot for reference.
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Answers (2)
Ruchika
on 11 Aug 2023
Moved: Image Analyst
on 11 Aug 2023
The error message "variable might be used before it is defined" typically occurs when you're trying to use a variable before it has been assigned a value or initialized. This error can often be resolved by ensuring that you define or initialize your variables properly before using them in your MATLAB code. In this code, 'yy3' has been used to initialise 'yy2' before being initialised itself. You want to have an initial value for 'yy3' before using it to resolve this error.
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VBBV
on 11 Aug 2023
Edited: VBBV
on 11 Aug 2023
Change this line
yy2 = Pr*(y(4)*y(2)-y(1)*y(5)-Df*yy3-Nb*y(5)*y(7)-Nt*y(5)^2)
to
yy2 = Pr*(y(4)*y(2)-y(1)*y(5)-Df*y(3)-Nb*y(5)*y(7)-Nt*y(5)^2)
% ^^
6 Comments
Torsten
on 11 Aug 2023
If you have an initial vector of length 8, you must return a dydt vector of length 8.
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