How to remove the swap vectors from a matrix?

Hello all,

I am facing few problem in MATLAB code and hoping to get solution from here. I am having a matrix of (30,2). As following

1 5

2 3

2 5

2 24

3 2

3 25

3 44

4 9

5 2

5 1

5 6

6 5

6 7

6 9

7 6

7 25

7 28

8 13

9 6

9 4

9 10

10 9

10 11

10 13

11 10

11 28

11 32

12 17

13 10

13 8

It can be seen that it has [2 3] in second row and [3 2] in fifth row andsimilarly few more rows are there. So, my problem is to remove the swaped row from the original and make another matrix. That means [2 3] will remain in the original matrix and [3 2] will goes to a new matrix. Similarly for other elements. Please help to get the code.

Best Regards

Answer 1

[Ameer Hamza]

Try this

[~, idx] = unique(sort(M, 2), 'rows');
M_unique = M(idx, :);

[BALAKRISHNA ADHIKARI]

Thanks Ameer. It did my work.

Answer 2

[madhan ravi]

[Original_matrix, c, ~] = unique(sort(matrix, 2), 'rows');
New_matrix = matrix(setdiff(1:size(matrix, 1), c), :)

[BALAKRISHNA ADHIKARI]

Thanks ravi.