"To avoid manually entering each line, I would like to use a looping method"
That is a good approach. The best approach is to use arrays.
"My searches bring me to the concept of 'dynamic access' (eval)"
That is a very bad approach.
"But am not sure if this applies to my case."
That advice definitely applies to your case. Your approach using dynamic variable names is not recommended: your approach forces you into writing slow, complex, inefficient, obfuscated, buggy code that is hard to debug:
So far there is no obvious reason why you could not just use basic matrices or arrays for your data, just like MATLAB is designed for. If all of those arrays are the same size then a basic 3D array would suffice.
Note that calling ZEROS with one input argument often produces unexpected results.
