MATLAB Answers

omit same element inside cell

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NA
NA on 3 Apr 2019
Commented: NA on 3 Apr 2019
A={[1,2,3,4],[4,2,3],[1,2,5,6,78,9],[1,2,3,4],[1,2,5,6,78,9],[4,2,3],[5,6,7]};
c=cellfun(@(x) unique(x),A,'UniformOutput',false);
I want to omit same array inside cell
result should be
A={[1,2,3,4],[4,2,3],[1,2,5,6,78,9],[5,6,7]};

  2 Comments

madhan ravi
madhan ravi on 3 Apr 2019
?? [4,2,3] & [5,6,7] have the same size there is something wrong in your logic or your explanation
NA
NA on 3 Apr 2019
Sorry I mean same array
[4,2,3] repeated 2 times
[1,2,3,4] repeated 2 times
[1,2,5,6,78,9] repeated 2 times
I want to have them one times

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Accepted Answer

Stephen Cobeldick
Stephen Cobeldick on 3 Apr 2019
Edited: Stephen Cobeldick on 3 Apr 2019
>> A = {[1,2,3,4],[4,2,3],[1,2,5,6,78,9],[1,2,3,4],[1,2,5,6,78,9],[4,2,3],[5,6,7]};
>> N = numel(A);
>> X = false(N,N); % find which arrays are the same:
>> for ii=1:N, for jj=1:ii, X(ii,jj)=isequal(A{ii},A{jj}); end, end
>> Y = X & cumsum(X,1)==1 & cumsum(X,2)==1; % indices that ignore duplicates.
>> Z = A(any(Y,1));
>> Z{:}
ans =
1 2 3 4
ans =
4 2 3
ans =
1 2 5 6 78 9
ans =
5 6 7

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More Answers (1)

Jos (10584)
Jos (10584) on 3 Apr 2019
You can convert the elements of each cell to a char array and apply unique on that cell array of chars.
A = {[1,2,3,4],[4,2,3],[1,2,5,6,78,9],[1,2,3,4],[1,2,5,6,78,9],[4,2,3],[5,6,7]};
% engine
[~,ix] = unique(cellfun(@(x) num2str(x), A ,'un', 0), 'stable') ;
B = A(ix) % as requested

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