Hi
You cannot find it because it's deprecated (although should still work, even in the new versions of matlab). This is the help page you are looking for:
I usually do it slightly differently: In simulink, I use an "Input Block" as an input. Then, in my script, I define a "timeseries" object.
example:
% define simulation time
t0 = 0;
tend = 10;
dt = 0.001;
t = t0:dt:tend;
% Generate unit step input
amplitude = 1;
t_step = 1; % I want a step at t = 1s
ind_vec = (t < t_step);
u = amplitude*ones(size(t));
u(ind_vec) = 0;
% create time series object
u_sim = timeseries(u,t,'Name','step_input');
% Now simulate system
% NOTE: the Input Block in your model must have "u_sim" set as parameter
sim('model')
I use a "to Workspace block" for the outputs. Just as a possible alternative.
Hope this helps.
