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Find unique or duplicate cells in cell array of chars

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Hadi Zyien
Hadi Zyien on 29 Aug 2019
Answered: Jos (10584) on 29 Aug 2019
If I have a cell array of cells containing strings such as:
A = {{'A', 'B', 'C'}, {'C', 'D', 'E'}, {'A', 'B', 'C'}, {'C', 'B', 'A'}}
how can I find which cells are duplicates of each other? Or conversely, how can I find which cells are unique?
In this example, the duplicate cells are A(1) and A(3), while the rest are unique.
Thanks!

Accepted Answer

Jos (10584)
Jos (10584) on 29 Aug 2019
A = {{'A', 'B', 'C'}, {'C', 'D', 'E'}, {'A', 'B', 'C'}, {'C', 'B', 'A'}}
N = arrayfun(@(k) sum(arrayfun(@(j) isequal(A{k}, A{j}), 1:numel(A))), 1:numel(A))
unique_elements = A(N==1)
duplicated_elements = A(N>1)

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