MATLAB: Error – “() Indexing must appear last in an index expression”; what is wrong with the code? I’m new to Matlab.

error

N(i)=(-1)^s*(F(f,1)(1/2)+F(f,2)(1/4)+F(f,3)(1/8))*2^(c-2)

F(f,1)(1/2) means that you want to index F at locations f and 1, and then you want to index that result at index 1/2 .

Perhaps you intended to write in some multiplication? MATLAB has no implicit multiplication.

size(A,1)

(instead of size(A)(1))

In MATLAB you cannot index into an array that you've already indexed into, so you cannot do this

out{i} = out2(:,:,j)(Cs{i}, beta{i}, As{i}, TCI{i}, TWI{i}, hs{i})

But assuming the rest of your code is OK (which I could not check), then you could define a temp variable

 out2_tmp = out2(:,:,j);
 out{i} = out2_tmp(Cs{i}, beta{i}, As{i}, TCI{i}, TWI{i}, hs{i})