How to retrieve unique columns in a matrix ?

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Sai Teja Suggala
Sai Teja Suggala 2022-3-10
评论： Stephen23 2023-1-25
I would like to retrieve all the unique columns in a matrix..
If my matrix =
1 -1 1 1
1 1 1 1
2 1 1 1
UniqueColumns =
1 -1 1
1 1 1
2 1 1
Thank you before hand.

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Stephen23
Stephen23 2022-3-10
编辑：Stephen23 2022-3-10
Ran in:
A = [1,-1,1,1;1,1,1,1;2,1,1,1];
B = unique(A.','rows','stable').'
B = 3×3
1 -1 1 1 1 1 2 1 1
  2 个评论
Laxmikant Sharma
Laxmikant Sharma 2023-1-24
编辑：Laxmikant Sharma 2023-1-24
What if you want the indeces too?
[B idx] = unique(A.', 'rows', 'stable').'
Not working!!!
Stephen23
Stephen23 2023-1-25
Ran in:
"What if you want the indeces too?"
A = [1,-1,1,1;1,1,1,1;2,1,1,1];
[B,idx] = unique(A.','rows','stable');
B = B.'
B = 3×3
1 -1 1 1 1 1 2 1 1
idx
idx = 3×1
1 2 3

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