From what I can gather, you are trying to use a C/C++ function in MATLAB which uses a struct and are facing issues while using the structure.
Open in MATLAB Online emp.x=[]; emp.info=[]; emp.fit=[]; pop=repmat(emp,1,1); pop(1).x=[1 2 3 4]; pop(2).x=[3 2 1 4]; pop(3).x=[1 2 3 4]; pop(4).x=[2 1 3 4]; How to make the above structure (pop) unique?
FYI, what you are proposing is possible but it requires creating and accessing the variables dynamically, which is a very bad way to write code, because it is slow, buggy, and obfuscated:
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