How to get matrices of edges and nodes from Simulink model
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I have a simulink model and I want to create a digraph of the block connections. I used the 'Portconnectivity' command to find each blocks source and destination block. I don't know how to create a digraph using the information from the 'Portconnectivity' command because I don't want to manually input all the nodes and edges. How do I generate a matrix of the nodes and edges in a Simulink model without manually inputting them so I can make a digraph of the block connections.
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Yukthi S
il 16 Feb 2024
Hi Madison Ohara
I got that you wanted to create digraph of the block connections without manually giving input nodes and edges.
I assume that you are using the latest Release of MATLAB since you did not mention any information about that.
The following MATLAB code will help you generate the digraph.
% Load the Simulink model (replace 'modelname' with the name of your model)
modelname = 'name_of_your_model';
load_system(modelname);
% Get a list of all blocks in the model
blocks = find_system(modelname, 'Type', 'Block');
% Initialize source and target node lists
sourceNodes = {};
targetNodes = {};
% Loop through each block and get its port connectivity
for i = 1:length(blocks)
% Get port connectivity information for the current block
ports = get_param(blocks{i}, 'PortConnectivity');
% Loop through each destination port
for j = 1:length(ports)
dstBlock = ports(j).DstBlock;
% Check if the destination block handle is valid (not -1)
if dstBlock ~= -1
% Get the name of the destination block
dstBlockName = getfullname(dstBlock);
% Add the source and target nodes to the lists
sourceNodes{end+1} = getfullname(blocks{i}); % Source block name
targetNodes{end+1} = dstBlockName; % Destination block name
end
end
end
% Create the directed graph from the node lists
G = digraph(sourceNodes, targetNodes);
% Plot the graph
figure;
plot(G);
You can also refer to the MATLAB documentation links of all the functions used in the above code:
“load_system”:https://in.mathworks.com/help/simulink/slref/load_system.html#:~:text=Load%20Model%20into%20Memory
“find_system": https://in.mathworks.com/help/simulink/slref/find_system.html#:~:text=find_system(%27type%27%2C%27block_diagram%27)
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