Matlab compare different sized vectors

Question

If I have 2 vectors: A with n elements and B with m elements and m < n,

how do I identify all the elements in A which are in B, without using a for loop?

Many thanks

Answer 1

C = intersect(A,B) will give you all the elements which are in both.

There's also ismember(A,B), which will return a logical array indicating for each member of A whether it is also a member of B.