Parse error at u: usage might be invalid MATLAB syntax.

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I want to draw a curve of a cubic equation in SIMULINK, which shows a syntax error. I don’t know what the error is.

Answers (1)

Dave B
Dave B on 25 Oct 2021
Edited: Dave B on 25 Oct 2021
If you want to multiply you need a *
y=-0.0811*u^3...
Also consider if you want to raise a vector to the power of 3, you probably want .^
y=-0.0811*u.^3...
  2 Comments
BO-HAO LIN
BO-HAO LIN on 25 Oct 2021
I made a stupid mistake, so do I have to modify it like this?
y=-0.0811*u.^3+13.573*u.^2-787.08*u+18366;

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