Iterating through each element in a matrix

2020 5 22
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更新时间：2020 5 22
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Hello,
Below is my code i want check if elements in vector/matrix match the other vector/matrix/scalar and popullate a empty matrix with the common elements. Attaching my code. In the attached code i have two Row Vectors of same size but want to know if it any different if one of them is scalar or (mxn) matrix and other is Row or Column Vector.
A = [1 2 3 2 5 2 5];
B = [3 3 3 3 39 9 9];
s = zeros(size(A));
for i = 1:size(A)
if any(A(i)==B(i))
s = s(i);
end
end

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Walter Roberson
Walter Roberson 2020-5-22

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s = intersect(A, B);

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Sai Gudlur
Sai Gudlur 2020-5-22
intersect tells me how many common elements in both the vectors but does not tell what element is that and location of the elements in each vector.
Walter Roberson
Walter Roberson 2020-5-22
intersect tells you the value of the common elements, not the number. With your particular data, the only value in common is 3.
Your original question only asks to find the common values, which is what intersect() does.
What is your desired output? A list of common elements, and for each one the row and column indices for each of the two matrices?
Sai Gudlur
Sai Gudlur 2020-5-22
Hello Walter,
You had previously answered this question so i looked at the old post and found a solution to what i need.
Thanks for pointing me in the right direction.
Sai
c = find(ismember(a,b,'rows'))
d = [];
for i=1:numel(c)
d(i,:) = a(c(i),:)
end
Option #2
c = intersect(a, b, 'rows', 'stable');

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