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How to remove repeating elments from a matrix?

Pushkar Satish Marathe さんによって質問されました 2017 年 11 月 3 日
最新アクティビティ Cedric Wannaz
さんによって コメントされました 2017 年 11 月 3 日
I have following matrix.
A =
1 2 2 1 3
2 1 3 1 1
Where, first two columns are in principle are unique combinations. I would like to remove one column, either 1st or 2nd, and generate following matrix
B =
2 2 1 3
1 3 1 1
OR
B =
1 2 1 3
2 3 1 1
I tried using following
[G,ia,ic] = unique(A(:,1:2),'rows');
uA = A(ia,:)
but it doesn't solve the problem and gives following solution
uA =
1 2 2 1 3
2 1 3 1 1

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1 件の回答

回答者: Cedric Wannaz
2017 年 11 月 3 日
編集済み: Cedric Wannaz
2017 年 11 月 3 日
 採用された回答

Almost, the idea was correct but you were not working on the correct dimension. Also, sorting the input array vertically makes columns composed of the same elements identical regardless of their order:
>> [~, ia] = unique( sort(A, 1).', 'rows', 'stable' ) ;
>> B = A(:, ia)
B =
1 2 1 3
2 3 1 1

  2 件のコメント

Worked very well !! Thanks a lot :)
Cedric Wannaz
2017 年 11 月 3 日
My pleasure!

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