Need to remove elements which repeated 2 times

NA
2020 3 3
1 个回答
回答已采纳
更新时间：2020 3 3
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I have
A=[1 2; 1,3; 1,4; 1,5; 2,3; 3,6; 4,5; 5,6];
element 2, 4, 6 repeated 2 times. I want to remove them from A.
A_new=[1,3; 1,5]

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KSSV
KSSV 2020-3-3
Where they have repeated? 3 also repeated right?
Turlough Hughes
Turlough Hughes 2020-3-3
So you want to remove rows if either value in that row has been repeated in another one?
NA
NA 2020-3-3
编辑：NA 2020-3-3
Yes, I want to remove rows if either element repeated only twice. 3 repeated three times.
A=[1 2; 1,3; 1,4; 1,5; 2,3; 3,6; 4,5; 5,6];
N=max(max(A));
for i=1:N
if sum(sum(A==i),2)==2
A(any(ismember(A,i),2),:)=[];
end
end
This code removes all element in A.
but I want to have A_new=[1,3; 1,5]
Turlough Hughes
Turlough Hughes 2020-3-3
If you have values repeated in the same row and nowhere else, is that row to be deleted also?
i.e. for this input
A=[1 2; 1,3; 1,4; 1,5; 2,3; 3,6; 4,5; 5,6; 8 8];
is then answer then
A_new = [1 3; 1 5; 8 8]; %or
A_new = [1 3; 1 5];
NA
NA 2020-3-3
in my case should be A_new = [1 3; 1 5];

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Alex Sune
Alex Sune 2020-3-3

0 个投票

A=[1 2; 1,3; 1,4; 1,5; 2,3; 3,6; 4,5; 5,6];
N=max(max(A));
A_new = A;
for i=1:N
if sum(sum(A==i),2)==2
A_new(any(ismember(A_new,i),2),:)=[];
end
end

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