FOUND:
A = [1 2 3 4 5 6 7 8 9 10];
B = [5 4 3 2 1 1 2 3 4 5];
C = ones(1, length(A));
D = 2.* ones(1, length(A));
figure(1)
plot3(1:length(A),C,A);
grid on
hold all
plot3(1:length(A),D,B);
legend('A','B')
xlabel('X');
view(-18,30)
maybe you know some better way.
thanks
Maurizio