New to matlab: Checking if the value of cells are the same in two matrices.

I have these two matrices M2(7344x2) and M3(8740x2)

I have this simple for loop that works if all the values in M2(:,1) and M3(:,1) are unique, but now this is not the case. Values repeat themselves 24 times in both matrices.For example M2(1:24,1)=1, M2(25:48,1)=2 and so on.

This is the code that works if the values are unique, how should i modify it?

O2 = M3;
for i=1:size(M2,1)
    for j=1:size(M3,1)
        if M3(j,1) == M2(i,1);
         O2(j,:) = M2(i,:);
         end
         end
    end
end

Thanks in advance!

Edit: So if the value is same, it should replace the whole row with values from M2, but somehow this does not work.

Answer 1

[E K]

I think I can not understand you completely but if you want a matrix without repeating elements you can use

a=unique(matrix_name)

if you are checking for rows

a=unique(matrix_name,'row')

[E K]

ok then. You should use eq() operator to get another matrix which will have boolean values in it. 1 for same element 0 for different.

sorting matrixes which will be compared will increase the speed.

you should also need a for loop for compression.