How to find path of the signal source from its name?

Above is the subsystem of my big model, in this I've 2 outports and the path of the subsytem is "MyModel/handle_error/apply_linear", this outports is going to my root of the model "MyModel". If i press "highlight to source" in my required signal at root path, it is taking me to my source.

How to get this via matlab command? Like if i give a signal name "final_output", the command should be able to give path of source "MyModel/handle_error/apply_linear"

Answer 1

[Abhaya]

Hi Vick,

To trace the origin of a signal in a Simulink model, you can utilize the‘SrcBlockHandle’and‘SrcPortHandle’parameters with MATLAB ‘get_param’function.

Please follow the given steps to find the source of a signal from its handle.

• Select the block from which you want to trace the signal's source.
• Refer to the code given below to trace the signal to the origin.

function src=traceSignalFun(blockHandle) 
    portHandles = get_param(blockHandle, 'PortHandles');
    src=getfullname(blockHandle);
    if isfield(portHandles, 'Inport') 
        line = get_param(portHandles.Inport(1), 'Line'); 
        if line ~= -1 % Check if there is a connected line 
            
            % Get the source block of the line 
            srcBlockHandle = get_param(line, 'SrcBlockHandle'); 
            srcPortHandle = get_param(line, 'SrcPortHandle'); 
            
            % Get the full name of the source block 
            srcBlockName = getfullname(srcBlockHandle); 
            
            % Get the source port number 
            srcPortNumber = get_param(srcPortHandle, 'PortNumber'); 
            
            blockType = get_param(srcBlockHandle, 'BlockType'); 
            if strcmp(blockType, 'SubSystem') 
                % Get the blocks inside the subsystem  
                outPorts=find_system(srcBlockHandle,'SearchDepth', 1, 'BlockType', 'Outport'); 
                src=traceSignalFun(get_param(outPorts(srcPortNumber),'Handle')); 
            else
                src=getfullname(srcBlockName);
            end
        end
    end
end 

%call the function using handle to the selected block
source=traceSignalFun(gcbh);
disp(source);

For further information, please refer to the MATLAB documentation for ‘get_param’ function,

https://in.mathworks.com/help/releases/R2019a/simulink/slref/get_param.html

Hope this helps.