intersect - returns the vector of common values of two vectors
intersect(a,b) returns a sorted row vector of common values of two vectors of a and b.
[v,ka,kb]=intersect(a,b) also returns index vectors ka and kb such that v=a(ka) and v=b(kb).
A=round(5*rand(10,1));
B=round(5*rand(7,1));
intersect(A,B)
[N,ka,kb]=intersect(A,B)
intersect('a'+string(A),'a'+string(B))