how can I check to see if two different matricies contain any of the same numbers?

For example I want to say A=[1 2 3 4 5 6] B=[7 1 8] If any element in matrix A is equal to matrix B then.... I want the statement to be true since 1 is contained in both matrix A and matrix B

Answer 1

[Azzi Abdelmalek]

any(ismember(B,A))

[Daniel Shub]

I don't see how this would work. First, I don't know how you would ever get isequal to return anything other than a logical scalar, so it is not clear what the any is doing. Second, isequal(B,A) will compare B and A to see if they are identical (ignoring class, but including size). Finally, for the OP's example your answer returns false, but the correct answer is true.

[Azzi Abdelmalek]

Sorry, my connection is actually too slow, it took too long to edit my answer. I meant "ismember")

[Daniel Shub]

Well that makes a lot more sense. I think I like ismember better than intersect

Answer 2

[Daniel Shub]

What you are interested in is if A and B intersect. The intersect function will tell you which elements are in both A and B or return empty if there are no common elements. You can test if an array is empty with isempty. Since you want to return true if the intersection is not empty (i.e., there is overlap), you need to negate the answer. You can do this with not. Putting it all together gives:

not(isempty(intersect(A, B)))