MATLAB - Matrice A - Calcolo Scientifico

A = [
    -1/4 1/10 1/10 0 0 0 0 0 0 0 0 0 0 0 0;
    1/10 -1/2 0 1/5 1/5 0 0 0 0 0 0 0 0 0 0;
    1/10 0 -1/2 0 0 1/5 1/5 0 0 0 0 0 0 0 0;
    0 1/5 0 -1 0 0 0 0.4 0.4 0 0 0 0 0 0;
    0 1/5 0 0 -1 0 0 0 0 0.4 0.4 0 0 0 0;
    0 0 1/5 0 0 -1 0 0 0 0 0 0.4 0.4 0 0;
    0 0 1/5 0 0 0 -1 0 0 0 0 0 0 0.4 0.4;
    0 0 0 0.4 0 0 0 -2 0 0 0 0 0 0 0;
    0 0 0 0.4 0 0 0 0 -2 0 0 0 0 0 0;
    0 0 0 0 0.4 0 0 0 0 -2 0 0 0 0 0;
    0 0 0 0 0.4 0 0 0 0 0 -2 0 0 0 0;
    0 0 0 0 0 0.4 0 0 0 0 0 -2 0 0 0;
    0 0 0 0 0 0.4 0 0 0 0 0 0 -2 0 0;
    0 0 0 0 0 0 0.4 0 0 0 0 0 0 -2 0;
    0 0 0 0 0 0 0.4 0 0 0 0 0 0 0 -2];