Hi @singh
The issue that you are facing is because the MATLAB's ‘biograph’ function expects a connection matrix where only non-diagonal and positive entries indicate connections between nodes. The diagonal entries represent self-connections, which are not allowed in this context.
A workaround for this would be the following:
Shift the Columns: Move each column of your matrix one position to the right, filling the first column with zeros.
Here is the code to implement the same. I have tried it in MATLAB R2021a:
% Original matrix DG2
DG2 = [
7.2263, 36.234, 41.867, 36.555;
0, 43.326, 49.059, 36.53;
0, 0, 6.9689, 58.871;
0, 0, 0, 61.001
];
% Initialize a new matrix with zeros
DG2_shifted = zeros(size(DG2));
% Shift the columns to the right
DG2_shifted(:, 2:end) = DG2(:, 1:end-1);
% This step ensures the diagonal elements are zero to avoid self-loops
DG2_shifted(logical(eye(size(DG2_shifted)))) = 0;
% Create the biograph object without self-connections
h = view(biograph(DG2_shifted, [], 'ShowWeights', 'on'));
The above implementation ensures a correct representation of your data as a graph, adhering to the requirements of the biograph function. I have attached the output of the above implementation. You can follow the documentation for ‘biograph’ object and function to know more about its usage: https://www.mathworks.com/help//releases/R2021a/bioinfo/ref/biograph.html
Hope it helps.
