Find unique in matrix of x,y coordinates
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Hello, I would love your help.
If I have a matrix of x,y coordinates for example:
x y
A=[ 2.5 3.5
1.2 3.5
2.2 1.2
1.2 3.5
4.0 2.2 ]
How do I find a unique of this? In the above example one instance of x,y (1.2, 3.5) will be removed?
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채택된 답변
Kelly Kearney
2017년 12월 19일
To find unique rows, you can use unique with the 'rows' option. (The 'stable' option preserves the input order, if that's important for your application).
unique(A, 'rows', 'stable')
추가 답변 (2개)
Kaushik Lakshminarasimhan
2017년 12월 19일
Did you try this?
[C,IA] = unique(A,'rows');
C contains all unique rows of A. IA contains the indices of the rows of A that are in C. So if you want the indices of the rows that were removed, you can use:
[nrows,~] = size(A);
notIA = setdiff(1:nrows,IA); % duplicate rows
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