Why is Matlab returning "Unbalanced or unexpected parenthesis or bracket."?

Hello, I am trying to code a program where the background changes color about every minute. In this expression:

background = backgrounds{mod(Bg_state,numel(backgrounds)}+1);

the number of beginning and end parenthesis and curly brackets are the same. Does this have something to do with bracket syntax? Thank you for your help.

[Roger Stafford]

Inside the curly brackets, the left and right parentheses don't balance. Also outside they don't balance.

Answer 1

[Jan]

The parenthesis overlap:

background = backgrounds{ mod(Bg_state,numel( backgrounds ) } + 1);
                        {                                   }
                             (                                   )

It is not only the number of braces and parenthesis, but the must be closed in the right order also.

[Md Mahmudul Hasan]

for i=min(find(time>=2.0)):length(u)

u(i) = 0.5;

end

%please help me to solving the error

[Walter Roberson]

does your actual code have & ?