omit same element inside cell

Asked by Naime on 3 Apr 2019

Latest activity Commented on by Naime on 3 Apr 2019

1 view (last 30 days)

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 on 3 Apr 2019

?? [4,2,3] & [5,6,7] have the same size there is something wrong in your logic or your explanation

Naime 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

2 Answers

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Answer by Stephen Cobeldick on 3 Apr 2019

Edited by Stephen Cobeldick on 3 Apr 2019

Accepted Answer

>> 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

0 Comments

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Answer by 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

1 Comment

Naime on 3 Apr 2019

thanks

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Naime (view profile)