https://au.mathworks.com/help/matlab/ref/matlab.system.propagatedinputfixedsize.html
matlab.system.propagatedInputFixedSize - Fixed-size status of input during Simulink propagation -...
This MATLAB function returns true or false to indicate whether an input argument of a System object is fixed size.
fixed sizematlabsystem
https://fr.mathworks.com/help/simulink/slref/matlab.system.propagatedinputfixedsize.html
matlab.system.propagatedInputFixedSize - Fixed-size status of input during Simulink propagation -...
This MATLAB function returns true or false to indicate whether an input argument of a System object is fixed size.
fixed sizematlabsystem