A unit step input with unity feedback using MATLAB Simulink ?

How to get a graph for a unit step input with unity feedback using MATLAB Simulink, for following transfer function ?

             -15 s
  ---------------------------
  s^3 + 25 s^2 + 290 s + 5300

Continuous-time transfer function.

[abhijit kulkarni]

 num=[0 0 1 0];
      den=[1 25 290 5300];
      sys=tf(num,den);
 num=[0 0 1 0];
      den=[1 25 290 5300];
      sys=tf(num,den);
      step(sys,1)
% OR now use >>help lsim

[thar]

This is not Simulink.

[nl2605]

what do you mean by unity feedback?

Answer 1

[Maximilian]

Connect a step input to a summing junction, put your transfer function in a Transfer Fcn block, add your feedback and connect the output to a scope.