u=c(1:3,8,0,3:6,2)
print(rank(u))
# output: 2.0 3.5 5.5 10.0 1.0 5.5 7.0 8.0 9.0 3.5
print(order(u))
# output: 5 1 2 10 3 6 7 8 9 4