(A) Your code has too much confusion over how you use size(). When you do not pass in a dimension number, size() returns a vector, and when you count on using a vector as one of the bounds of a "for" loop then you likely have a bug.
(B) Do not syms up a scalar variable and then index into it. Do one of the following instead:
1)
variable = sym('prefix', [Size])
such as
qv = sym('qv', size(CC{i,j}));
This initializes the output as an array of symbol names that start with the prefix and have array indices built in, such as qv3_5 . You probably do not want this in your case;
2)
variable = sym(zeros(Size))
such as
qv = sym( zeros(1, size(CC{i,j},2)) );
or
3)
variable = zeros(Size, 'sym');
such as
qv = zeros(1, size(CC{i,j},2), 'sym');
This is more efficient than (2) but requires a newer MATLAB.
