Open Simulink model.

model = 'magball';
open_system(model)

Create a vector of analysis points for linearizing the plant model:

io(1) = linio('magball/Controller',1,'input');
io(2) = linio('magball/Magnetic Ball Plant',1,'openoutput');

Write the analysis points to the magball model.

setlinio(model,io);

The analysis points in io are added to the model as annotations. You can then save the model to store the analysis points with the model.

Open Simulink model.

open_system('scdcstr')

Create analysis points for finding the transfer function between the coolant temperature and the residual concentration.

io(1) = linio('scdcstr/Coolant Temp',1,'input');
io(2) = linio('scdcstr/CSTR',2,'output');

Set the analysis points in the Bode Plot block.

setlinio('scdcstr/Bode Plot',io);

View the analysis points in the Bode Plot Block Parameters dialog box.

open_system('scdcstr/Bode Plot')

During simulation, the software linearizes the model using the specified analysis, and plots the magnitude and phase responses for the resulting linear system.

Open Simulink model.

mdl = 'scdpwm';
open_system(mdl)

This model is configured with analysis points for finding the combined transfer function of the PWM and plant blocks.

Create analysis points for finding the transfer function of just the plant model.

io(1) = linio('scdpwm/Voltage to PWM',1,'input');
io(2) = linio('scdpwm/Plant Model',1,'output');

Store the analysis points to the model, and save the previous analysis point configuration.

oldio = setlinio(mdl,io)

2x1 vector of Linearization IOs: 
--------------------------
1. Linearization input perturbation located at the following signal:
- Block: scdpwm/Step
- Port: 1
2. Linearization output measurement located at the following signal:
- Block: scdpwm/Plant Model
- Port: 1