How to delete all repeat rows?

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Wang Jack
Wang Jack 2020-5-19
评论： Rik 2020-5-22
How to delete all repeat rows?
I mean all repeat rows, like :
A=
[0 4;
2 4;
0 4;
4 8;
3 4]
How to got new_A=
[2 4;
4 8;
3 4]

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Rik
Rik 2020-5-19
编辑：Rik 2020-5-19
There is probably a more efficient way, but you can use unique() to get all first occurrences. Then you can use the second output to find all removed rows, which you can use as an input to setdiff.
A=[0 4;2 4;0 4;4 8;3 4;0 4];
[B,ind]=unique(A,'stable','rows');
ind=setdiff(1:size(A,1),ind);
B=setdiff(B,A(ind,:),'rows');
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Wang Jack
Wang Jack 2020-5-22
Aaaaaawesome, thanks for the help!
Rik
Rik 2020-5-22
Glad to be of help. If it solved your problem, please consider marking it as accepted answer. If not, feel free to comment with your remaining issues.

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