[R] alternate rank method

[Douglas Grove]

Hi,

I'm wondering if anyone can point me to a function that will
allow me to do a ranking that treats ties differently than
rank() provides for?

I'd like a method that will assign to the elements of each 
tie group the largest rank. 

An example:  

For the vector 'v', I'd like the method to return 'rv'

 v:  1 2 3 3 3 4 5 5 6 7
rv:  1 2 5 5 5 6 8 8 9 10


Thanks,
Doug Grove