Remove duplicate rows from matrix
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Hello
I have a 2xN matrix where each column represent the x and y coordinates of a 2D point. I need to remove any duplicate point from this matrix, any suggestions?
Best regards MC
4 个评论
Stephen23
2017-5-14
Note that 2xN is a matrix, and not a vector.
MC
2017-5-14
Garvit Amipara
2022-3-6
It would be very nice of you, if you could change the title of this question, it misleads others who are actually looking for the answers related to 'vector'. Thank you(:
Stephen23
2022-3-6
@Garvit Amipara: done.
采纳的回答
It is trivial to use unique to get only the unique rows of matrix. Because your matrix is arranged 2xN, simply transpose before and after:
unique(M.','rows').'
5 个评论
Mr M.
2018-2-6
what does it mean .' ? why not just ' is the transpose?
Guillaume
2018-2-6
@Mr M, Why don't you look it up in the doc.
If your matrix is made of only non-complex number the difference does not matter, but if you may have complex numbers in your matrix, using ' instead of .' will lead to problems.
Stephen is correct to use .' in his answer.
LO
2019-4-12
how can I keep all values of each row ?
Paween Pongsomboon
2022-2-18
I don't know if you still alive, stephen. I wish I could hug you now!
Thx for the super solution
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