What could be the solution of this error (Parse error ar'(':usage might be invalid MATLAB syntax)?

I have the following error that is appearing in my work in %time domain

%time domain

1-tmin=0;

2-tmax=200;

3-dt1= ((2*D)/(U^2))-(deltax/U);

4-deltat=0.8*min([0.1,dt1]);

5-if deltat<0.01

6-deltat=0.01;

end

Line 6 deltat = 0.01;

the error is (Parse error ar'(':usage might be invalid MATLAB syntax).

[DGM]

This doesn't make sense. There's seems to be some code that's either missing or incomplete (since there are lots of undefined variables). Are those line numbers literally in the file as code? Regardless of whether they are, they're not on the right lines. The error message describes a syntax error which is clearly not even present on the line described.

Paste or attach the actual code and/or error message, not a reinterpretation of it.

[Manikanta Aditya]

I feel, D, U and deltax are to be defined, rest part code is fine. Yeah those 1-, 2- are line numbers xD

[Stephen23]

"Yeah those 1-, 2- are line numbers xD"

Get rid them.

Answer 1

[Manikanta Aditya]

Hi @Abdallah Alrefaie

The error message you’re seeing is typically due to a syntax error in your MATLAB code. In your case, the error message is “Parse error at ‘(’: usage might be invalid MATLAB syntax”. This suggests that there might be an issue with the use of parentheses in your code.

Check this code:

D = 1; 
U = 1; 
deltax = 1; 
tmin=0;
tmax=200;
dt1= ((2*D)/(U^2))-(deltax/U);
deltat=0.8*min([0.1,dt1]);
if deltat<0.01
    deltat=0.01;     
end

Hope this helps.

[Abdallah Alrefaie]

@Manikanta Aditya Thank you for your answer. I've tried your suggestion but it didn't work. However, why not accept the help?!

[DGM]

"it didn't work" tells us nothing meaningful.

What is the actual code you are trying to run?

What is the actual error message that you get?

[Manikanta Aditya]

@Abdallah Alrefaie, I ran the same code I mentioned above in my MATLAB R2024a, and I was able to get the correct outputs. as mentioned by @DGM if you have any errors share them here.

[Abdallah Alrefaie]

@Manikanta Aditya Thank you for your answers and cooperation.

[Manikanta Aditya]

Welcome @Abdallah Alrefaie