How to use unique function in 2D matrices?

hello

I would like to know how I can use the unique function in matlab in such a way that i take off similar elements out of the 2D matrix, provided that the unique function does NOT SORT out he matrix and does NOT CHANGE ITS SHAPE

for example, consider x = [1 1 2 2 3 3 4 4; 5 5 6 6 7 7 8 8 ; 9 9 10 10 11 11 12 12]

output x = [1 2 3 4; 5 6 7 8; 9 10 11 12]

when I used unique, I did not find a way that did not play around with the shape of the 2D matrix

[Jan]

Are you sure that all rows contain the same number of unique elements?

[Maitham Al Lawati]

yes pretty much, I don't really have a problem with the working of the unique function other than the fact that its sorts out everything and changes the 2D matrix to a 1D matrix.

Answer 1

[Jan]

   x = [1 1 2 2 3 3 4 4;  5 5 6 6 7 7 8 8;  9 9 10 10 11 11 12 12]
   nRow = size(x, 1);
   c = cell(1, nRow);
   for iRow = 1:nRow
     c{iRow} = unique(x(iRow, :), 'stable');
   end
   result = cat(1, c{:});  % Fails if number of unique elements differ

[Maitham Al Lawati]

thank you

Answer 2

[Marc Jakobi]

x = [1 1 2 2 3 3 4 4; 5 5 6 6 7 7 8 8 ; 9 9 10 10 11 11 12 12];
y = unique(x','rows')';

[Maitham Al Lawati]

thanks