i want to get adjacency matrix of a network

i have write this but is not running

clc;
clear all
n=10;
p=0.4;
adj_matrix = generate_adjacency_matrix(n, p);

function adj_matrix = generate_adjacency_matrix(n, p)
% Initialize an n x n matrix with all zeros
adj_matrix = zeros(n, n);

% Loop through all possible node pairs
for i = 1:n
    for j = 1:n
        % Skip diagonal elements (no self-loops)
        if i == j
            continue;
        end
        
        % Generate a random number between 0 and 1
        random_number = rand();
        
        % If the random number is less than p, add a link between nodes i and j
        if random_number < p
            adj_matrix(i, j) = 1;
            adj_matrix(j, i) = 1; % Since it's an undirected network
        end
    end
end
end


disp(adj_matrix);

[Bruno Luong]

@MD KAUSAR SK The answer thread is unlike undirected graph, you should not duplicate it https://www.mathworks.com/matlabcentral/answers/2002382-network-adjacency-matrix-for-connecting-n-node-with-probability-p?s_tid=srchtitle

Answer 1

[Matt J]

Easier:

function adj_matrix = generate_adjacency_matrix(n, p)

  adj_matrix=triu(rand(n)<p,1);
  
  adj_matrix=adj_matrix+adj_matrix'; % Since it's an undirected network

end

Answer 2

[Steven Lord]

If you want to generate both the graph object and its adjacency matrix, tell MATLAB to build the graph using just the upper triangular part of the random matrix.

n = 10;
p = 0.6;
A = rand(n) < p;
G = graph(A, 'upper');
adj = full(adjacency(G))

adj = 10×10

0 0 1 0 0 1 0 1 0 0 0 1 0 1 1 1 0 1 1 1 1 0 1 1 0 1 0 1 0 1 0 1 1 1 1 1 0 1 1 1 0 1 0 1 1 1 0 1 1 1 1 1 1 1 1 1 0 0 1 0 0 0 0 0 0 0 0 1 0 1 1 1 1 1 1 0 1 1 0 0 0 1 0 1 1 1 0 0 1 1 0 1 1 1 1 0 1 0 1 1

check = triu(A)+triu(A, 1).'

check = 10×10

0 0 1 0 0 1 0 1 0 0 0 1 0 1 1 1 0 1 1 1 1 0 1 1 0 1 0 1 0 1 0 1 1 1 1 1 0 1 1 1 0 1 0 1 1 1 0 1 1 1 1 1 1 1 1 1 0 0 1 0 0 0 0 0 0 0 0 1 0 1 1 1 1 1 1 0 1 1 0 0 0 1 0 1 1 1 0 0 1 1 0 1 1 1 1 0 1 0 1 1

isequal(adj, check)

ans = logical
   1

[mks]

how can draw it ?

[Steven Lord]

Since I created the graph object before creating the adjacency matrix, just plot it.

plot(G)