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position of values in a matrix

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sampath kumar punna
sampath kumar punna 29 Oct 2019
i have a set of matrix
23 24
35 2
12 19
24 23
12 15
26 17
i want to know the position of in the matrix of [35 2], [12 15]
which is 2 and 5
is it possible to get the position of it.

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답변(2개)

Alex Mcaulley
Alex Mcaulley 29 Oct 2019
A = [23 24
35 2
12 19
24 23
12 15
26 17]
loc = find(ismember(A,[35 2],'rows'))
loc =
2

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Alex Mcaulley
Alex Mcaulley 29 Oct 2019
Another option:
[~,loc,~] = intersect(A,[35 2],'rows')
loc =
2

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ME
ME 29 Oct 2019
If I understand what you are asking then you could use:
Z=[23 24; 35 2; 12 19; 24 23; 12 15; 26 17];
M=[35 2; 12 15];
pos = find(ismember(Z, M, 'rows') == 1);
where Z is your original matrix, M is a matrix of the items you want to search for and pos is the output containing the locations of those items.

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Walter Roberson
Walter Roberson 29 Oct 2019
good sportiveness
sampath kumar punna
sampath kumar punna 30 Oct 2019
this code is not working when the elements in the row are repeated

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