Find unique or duplicate cells in cell array of chars

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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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R2016b

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