A = importdata('~/Matlab/data/adjacency_matrix.txt');
A = A([1:9 11:15], [1:9 11:15]);
[G p] = rank(A);
>> A
A =

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

p
p =

    0.0471
    0.0409
    0.0359
    0.0321
    0.0428
    0.0414
    0.0517
    0.0502
    0.0482
    0.1710
    0.1036
    0.0412
    0.1075
    0.1865

diary off