Matlab - Complemento conjunto

function [VecC] = complemento (A, B)

% Variables

    VecC=[];

    cont=0;

    for i=1:length(A)

    for j=1:length(B)

        if A(i)~=B(j);

           cont = cont + 1;

           VecC(cont) = A(i);

        end

    end

    end

end

function VecC = complemento (a, b)

u=b;

for i=1:length(a)

    bol=0;

    for j=1:length(b)

        if a(i)==b(j)

            bol=1;

        end

    end

    if bol==0

        u=[u a(i)];

    end

end

U=[1 2 3 4 5 6 7 8 9];

u;

 VecC=[];

  cont=1;

     for i=1:length(U)

    for j=1:length(u)

       if U(i)==u(j)

           uu=U(j);

           break;

       end

    end

         if j==length(u) && U(i)~=u(j)

        VecC(cont) = U(i);

        cont=cont+1;

        end

     end

 end

>> a=[4 7 8 6], b=[1 9 3], VecC=complemento(a,b)

a =

     4     7     8     6

b =

     1     9     3

VecC =

     2     5