MATLAB: Finding rows in matrix containing numbers from vector

comparecontaining multiple valuesfindMATLAB

I have a matrix and a row vector

M = [1 4 3; 1 2 5; 3 2 1; 5 3 4; 2 3 5];
A = M(1,:);

Now, I wish to find the indices of all rows in M containing at least two of the values in A. As such, the desired output is

index = [1; 3; 4];

How would I do that?

find(sum(ismember(M,A),2)>=2)

Use the row output of find

>> A = [ 3 4 ; 1 3; 5 6];
>> [r,c] = find(A==4);
>> A(r,1)
ans =
     3

you can have something like this:

A=[1;1;1;2;2;2;2;3;3;3];

B = unique(A); % which will give you the unique elements of A in array B

Ncount = histc(A, B); % this willgive the number of occurences of each unique element

best NS