how to convert edge list to adjacency matrix

i have the code

     function adj=edgeL2adjj(e)
     Av=[e; fliplr(e)];
    nodes=unique(Av(:, 1:2)); % get all nodes, sorted
    adj=zeros(numel(nodes));   % initialize adjacency matrix
    % across all edges
    for i=1:size(Av,1)
        adj(nodes==Av(i,1),(nodes==Av(i,2)))=1;
    end
end

in matlab to convert edge list to adjacency matrix but if i input u=[8 5;1 4;3 5;6 7] then i divided into two set[8 5;1 4], [3 5,6 7] and apply previous code on [8 5;1 4] will get matrix 7 x 7 but i want 8 x 8

Answer 1

[Walter Roberson]

   u=[8 5;1 4;3 5;6 7];
   num_nodes = max(u(:));
   adj_matrix = accumarray(u, 1, [num_nodes, num_nodes]);

Note: if there can be duplicate entries you can add ">= 1" to the end.

[muhammad ismat]

Thanks to your efforts, it's simple code