[fgabertb]

subplot(2,1,1)
x=[1 5 3 4];
y=[5 6 9 8];
plot(x,'r')
hold on
plot(y)

subplot(2,1,2)
a=[11 12 13 16];
b=[25 46 35 12];
plot(a,'k')
hold on
plot(b,'r')
:smile: