Is this an Adjacency list ?

I converted a .gml file to adjacency list and got the following output. Is this how an adjacency list of 7x1 cell look?

li = 

    [1x2 double]
    [1x2 double]
    [1x2 double]
    [1x2 double]
    [1x2 double]
    [1x2 double]
    [1x2 double]

Answer 1

[Walter Roberson]

It could. But it probably doesn't.

You could use cell2mat(li) which would output a 7 x 2 numeric array.

I suspect that our li is a list of node number pairs, as opposed to an adjacency matrix. If so then,

li_m = mat2cell(li);
numnodes = max(li_m(:));
adj = sparse(li_m(:,1), li_m(:,2), 1, numnodes, numnodes);

[vignesh raju]

Hey Walter. Apologies for the late reply. This is exactly what I'm trying to do, convert it to an Adjacency matrix. When i run the second command max(li_m(:));

I get the following error message - Undefined function 'max' for input arguments of type 'cell'.

Could you please tell me what's happening here ?

[vignesh raju]

Solved that by using it directly as an array and not as a cell array.

[Walter Roberson]

Sorry,

li_m = mat2cell(li);

should have been

li_m = cell2mat(li);