how to compare a single row with remaining all rows of a matrix?
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my input matrix is v=[1 2 3 4 5;3 4 7 8 9;6 4 8 7 9;3 4 7 8 9;3 2 9 8 4]; I am taking second row alone. I have to compare it with all the remaining rows. How to do it. Suggest me simple code which has few lines.
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Jan
2012년 9월 3일
What have you tried so far? Which problems occurred? What does "compare" exactly mean?
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Azzi Abdelmalek
2012년 9월 3일
편집: Azzi Abdelmalek
2012년 9월 3일
v=[1 2 3 4 5;3 4 7 8 9;6 4 8 7 9;3 4 7 8 9;3 2 9 8 4]
v2=v(2,:);
comp=any(bsxfun(@minus,v,v2),2))
%the result:
comp=1 0 1 0 1
that means that fourth row (comp(4)=0) is equal to the second row
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Jacek
2015년 10월 25일
For the future generations: I tested both solutions and solution proposed by Azzi is much faster, exactly 9x faster in my application, what was very important for me (large-scale data structures reorganization).
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