Whhat is the best way to remove repitions of two or three vectors?

suppose I have a=[9 10 6 3 7],b=[1 9 6 7 8], I want to remove the repartitions so that:a=[9 10 6 3 7],b=[1 0 0 0 8]

Answer 1

[Walter Roberson]

b(ismember(b,a)) = 0;

[yousef Yousef]

Perfect thanks for this one line answer