[R] is there a way to do dense rank in R

[Matt Shotwell]

> x <- c(5,7,7,9)
> rank(unique(x))[match(x, unique(x))]
[1] 1 2 2 3

On Thu, 2010-07-01 at 21:30 -0400, Suresh Singh wrote:
> I have not been able to find a way to do dense rank in R
> 
> Here is an example of what I need
> 
> rank() gives the following
> 
> 5 rank 1
> 7 rank 2
> 7 rank 2
> 9 *rank 4*
> 
> but I want
> 
> 5 rank 1
> 7 rank 2
> 7 rank 2
> 9 *rank 3*
> *
> *
> thanks
> SS
> 
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> 
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-- 
Matthew S. Shotwell
Graduate Student
Division of Biostatistics and Epidemiology
Medical University of South Carolina
http://biostatmatt.com