Hi, I want to plot 3 signals in the same time domain (x domain). It should have the following aspect: <http://octave.1599824.n4.nabble.com/file/t372684/Salida_small_signal.jpg> This was the result I obtained last week. However I forgot to save the updated code in Octave, and though I think these lines should give the same result: % input subplot(3,1,1) plot(t,u_idref) ylim([0.7 0.9]) xlim([0.999 1.02]) U = [u_Vd u_Vq u_Id u_Iq u_idref u_iqref]; x0=[0;0;0.0024;0;0;0.08482] % Response of the model [y,t,x] = lsim(sys,U,Ts,x0) subplot(3,1,2) plot(t,y(:,1)) ylim([-200 120]) xlim([0.999 1.02]) subplot(3,1,3) plot(t,y(:,2)) ylim([-30 10]) xlim([0.999 1.02]) I only obtain this one: <http://octave.1599824.n4.nabble.com/file/t372684/last_one.jpg> I don´t know why the 2 last figures are not plotted... Any suggestions? -- Sent from: http://octave.1599824.n4.nabble.com/Octave-General-f1599825.html