Rerunning Setup Method When Using System Objects

I am using System Objects where some of the properties are initialised in the setupImpl method. The issue is that sometimes on the first iteration some of the System Objects in a cascade receive empty values as an input. As a result setupImpl method can't be run properly. Is there a way to rerun setupImpl method or skip it if the input is empty.

Answer 1

[Infinite_king]

Hello Leon,

I understand that you would like to execute the 'setupImpl' function on a system object after the initial setup of the object is completed.

You can achieve this by using the 'setup' function as shown below in the following code snippet,

% obj is the system object
% input1, inputN .. are the sample inputs to validate
setup(obj,input1,...,inputN);

The 'setup' function also performs additional validation of input arguments. For a detailed call sequence, please refer to the following link: https://www.mathworks.com/help/matlab/matlab_prog/call-sequence.html#:~:text=Call%20Sequence.-,setup%20Call%20Sequence,-When%20you%20run

The 'setupImpl' function is executed the first time the system object runs. In some cases you can skip 'setupImpl,' by include a bypass statement as follows

function setupImpl(obj)
  if obj.StartValue == not_invalid_value
     .
     .
     % Setup operations
     .
     .
  end
end

For more information, please refer the following documentation,

1. https://www.mathworks.com/help/matlab/ref/setup.html
2. https://www.mathworks.com/help/matlab/matlab_prog/call-sequence.html
3. https://www.mathworks.com/help/dsp/ref/cascade.html

Hope this is helpful.