Extracting available Bus signals in a nested Bus recursively.

I have some nested Bus objects in the workspace which are similar to the example "Create Bus Objects from Bus Element Objects" (https://de.mathworks.com/help/simulink/slref/simulink.bus.html). Now I am trying to access the available signal names by using a recursive function.

This is the code:

function signals = extract_bus_signals(bus_obj)

signals = {};
tempVal = bus_obj.Elements;
i_end = size(tempVal,1);
% loop through each element in the bus object
for i = 1:i_end
    % check if the element is a bus object

    if contains(string(tempVal(i,1).DataType),'Bus')
        nested_bus_name = extractAfter(tempVal(i,1).DataType, 'Bus: ');

        extract_bus_signals((nested_bus_name));
    else
        % add the name of the signal to the overall signals list
        signals{end+1} = bus_obj.Elements(i).Name;
    end
end

The error that I am getting is :

Dot indexing is not supported for variables of this type.

Error in extract_bus_signals12 (line 5)

tempVal = bus_obj.Elements;

Error in extract_bus_signals12 (line 14)

extract_bus_signals12((nested_bus_name));

I believe I am getting this error because when I pass 1st nested Bus name( 'NestedBus' ) which I am getting at ( "nested_bus_name = extractAfter(tempVal(i,1).DataType, 'Bus: ');"), which is a "string" to "bus_obj". instead of a bus. Any ideas to how to pass the child bus as bus object when calling the function.

My understanding might be wrong. Any guidance is appreciated.

Thank you

Answer 1

[Oguz Kaan Hancioglu]

Since it is defined is yor base workspace, you can use this,

Mathias Benedek (2023). NSTRUCT2CELL (https://www.mathworks.com/matlabcentral/fileexchange/29908-nstruct2cell), MATLAB Central File Exchange. Retrieved February 25, 2023.

[Anubhav Routray]

Unfortunately, it is not working for Bus objects. Its just keeping the Bus object in a cell. And clicking on the cell opens the Bus editor

[Oguz Kaan Hancioglu]

Before using the nstuct2cell I used following commands,

portHandles = get_param('bus creater location in sumulink (use gcb)','PortHandles')

After you check the handle of bus creater, you can convert the struct,

portStruct = Simulink.Bus.createMATLABStruct(portHandles.Outport)

you can feed the portStruct to NSTRUCT2CELL (nstruct2cell(portStruct))

Best