Code:
for i = 1:a(1)
A(teams(i,1),teams(i,1)) = A(teams(i,1),teams(i,1)) + 1;
A(teams(i,1),teams(i,2)) = A(teams(i,1),teams(i,2)) + 1;
A(teams(i,1),teams(i,3)) = A(teams(i,1),teams(i,3)) + 1;
A(teams(i,2),teams(i,1)) = A(teams(i,2),teams(i,1)) + 1;
A(teams(i,2),teams(i,2)) = A(teams(i,2),teams(i,2)) + 1;
A(teams(i,2),teams(i,3)) = A(teams(i,2),teams(i,3)) + 1;
A(teams(i,3),teams(i,1)) = A(teams(i,3),teams(i,1)) + 1;
A(teams(i,3),teams(i,2)) = A(teams(i,3),teams(i,2)) + 1;
A(teams(i,3),teams(i,3)) = A(teams(i,3),teams(i,3)) + 1;
B(teams(i,1),1) = B(teams(i,1),1) + scores(i);
B(teams(i,2),1) = B(teams(i,2),1) + scores(i);
B(teams(i,3),1) = B(teams(i,3),1) + scores(i);
B(teams(i,1),2) = B(teams(i,1),2) + diffscores(i);
B(teams(i,2),2) = B(teams(i,2),2) + diffscores(i);
B(teams(i,3),2) = B(teams(i,3),2) + diffscores(i);
end