find the repetition of matrix rows

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yousef Yousef
yousef Yousef 2014-5-8
评论： yousef Yousef 2014-5-8
I want to find out if the row i of mxn matrix is repeated ,the code should give logic 1.Otherwise zero"there are many ways but Im searching for the best one" Thanks

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the cyclist
the cyclist 2014-5-8
Using the algorithm that Jan Simon posted in this Answer.
% Example of data
X = [6 5 4;
1 2 3;
1 2 3;
1 2 4;
1 2 3];
[~,~,A] = unique(X,'rows','stable');
[n, bin] = histc(A, unique(A));
multiple = find(n > 1);
indexToDuplicate = ismember(bin, multiple);

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