How do I trace the signals in subsystems that come directly from the root level inports in Simulink 7.4 (R2009b)?

I have a model that has multiple subsystems. The subsystem may also have child subsystems. I want to find the signals in all the subsystems that are coming directly from the root-level inports. I want to highlight the blocks and signal with a color of my choosing.

Answer 1

[MathWorks Support Team]

There is no single command in MATLAB that can perform this task. However, we can achieve this using combination of commands such as 'find_system' and 'get_param'. The properties of blocks that are useful in this case are 'PortConnectivity', 'Handles', 'Parent' and 'BlockType'. See the attached function for an example code that accomplishes this task on the attached test model. Run the attached MATLAB script as follows:

change_colors_recursive(test_model, 'red')