MATLAB求交集和并集代码

syms a b c d e f g h i j 
U=[a b c d e f g h i j];
A=[a b d e j];
B=[b c d j];
C=[A,B]; 
[m,n]=size(C);
t=1;
for i=1:n-1
    for j=i+1:n
        if C(i)==C(j)
            D(t)=C(i);
            t=t+1;
        end
    end
end

k=1;
for i=1:n
     E(k)=C(i);
      kk=1;
      for s=1:k-1
             if E(k)==E(s)
                 kk=0;
                 break;
             end
      end
         k=k+kk;  
 end
 if kk==0
     E(k)=[];