A = importdata('~/Matlab/data/adjacency_matrix.txt');
[G p] = rank(A);
G
G =
  Columns 1 through 4

    0.0100    0.0100    0.0100    0.0100
    0.4350    0.0100    0.2933    0.0100
    0.0100    0.2933    0.0100    0.4350
    0.0100    0.0100    0.0100    0.0100
    0.0100    0.2933    0.0100    0.0100
    0.0100    0.0100    0.2933    0.0100
    0.0100    0.2933    0.0100    0.0100
    0.0100    0.0100    0.2933    0.0100
    0.4350    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100    0.4350
    0.0100    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100    0.0100

  Columns 5 through 8

    0.4350    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100    0.4350
    0.0100    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100    0.0100
    0.4350    0.4350    0.4350    0.0100
    0.0100    0.4350    0.4350    0.4350
    0.0100    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100    0.0100

  Columns 9 through 12

    0.0100    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100    0.0100
    0.2933    0.0100    0.0100    0.0100
    0.2933    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100    0.2933
    0.0100    0.0100    0.0100    0.2933
    0.0100    0.0100    0.0100    0.0100
    0.2933    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100    0.2933
    0.0100    0.0100    0.0100    0.0100
    0.0100    0.8600    0.0100    0.0100
    0.0100    0.0100    0.0100    0.0100
    0.0100    0.0100    0.8600    0.0100

  Columns 13 through 15

    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100
    0.0100    0.0100    0.0100
    0.4350    0.0100    0.0100
    0.0100    0.2225    0.0100
    0.0100    0.2225    0.0100
    0.0100    0.0100    0.4350
    0.0100    0.2225    0.0100
    0.4350    0.0100    0.4350
    0.0100    0.2225    0.0100

p
p =

    0.0268
    0.0299
    0.0299
    0.0268
    0.0396
    0.0396
    0.0396
    0.0396
    0.0746
    0.1063
    0.1063
    0.0746
    0.1251
    0.1163
    0.1251