[R] ranking a vector in R

[Prof Brian Ripley]

On 21/06/2012 07:24, Petr Savicky wrote:
> On Thu, Jun 21, 2012 at 12:24:47AM +0200, Jessy wrote:
>> Hello,
>>
>>
>> May someone help me with how in R I can rank a vector from highest to
>> lowest. i.e  rank 1 (smallest rank) is given to the highest value instead
>> of the usual way that it get's the highest rank.
>
> Hello:
>
> Try
>
>    x <- c(3, 2, 4, 1)
>    rank(-x)
>
>    [1] 2 3 1 4

Or more generally

rank(-xtfrm(x))

which works also for non-numeric x.


-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
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