Error using Simulink using plot function

Hi people I have done a project with Simulink and I wanna know the frequency response of an input G(s) called tfsys. It works good. But when I do :

   input_frequency = 1e-2;
   sim('name');
   figure(4);
   plot(time_out,u,time_out,y);

Here I have an error because plot doesn t have sufficient parameters. I attached the Simulink's project. It comes from :

x1_dot=x2; x2_dot=1/m1[F+k2(x1+x3) - b1x2 - k1x1] x3_dot=x4 x4_dot=1/m2[-k2(x1+x3)-b2x4-k3x3]

Answer 1

[Andreas Goser]

Without the error message it is guess work... Maybe the variable size is different for some reason? What does

whos time_out u y

return?

Answer 2

[Elvio]

i just want to simulate in my project with a sine wave as input with low and high frequency and see the diferrent with a figure.I can choose timeout

[Andreas Goser]

Can you answer my questions? Error message and 'whos' output.