Matlab error message, help please

[Daniel1992]

I get this error message

Subscript indices must either be real positive integers or logicals.

Error in doubleODE (line 14)
dYdt(2) = l1*(m1 + m2)*Y(4) - l2*m2*Y(3)*cos(Y(1) - Y(2))/...

I am having trouble working out what is causing the problem. Any advice?

Thanks

 

[Simon Bridge]

It means that you have indices which are not positive integers or logicals so that it chokes on line 14
The actual fault will be before then - without the source code we cannot possibly help.

 

[Daniel1992]

I found the error. Turns out I missed a * when multiplying :-|

 

[Simon Bridge]

Well done.
Amazing what you miss.

 

[rezeew]

for reaching out for help with this error message. It seems that the issue is related to the indices used in your code. The error message is indicating that the indices must be real positive integers or logicals, meaning they must be whole numbers or true/false values.

To troubleshoot this issue, you can start by checking the values you are using for the indices in line 14. Make sure they are whole numbers and not decimals or fractions. Additionally, check that the values are within the range of the array you are trying to access.

Another possibility is that the indices are not being calculated correctly, which could be due to a mistake in your code. You can try printing out the values of the indices to see if they are being calculated correctly.

If you are still having trouble, you can also try reaching out to the Matlab community for further assistance. They may be able to provide more specific advice based on your code and the error message. Good luck!