ranking a vector in R

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Hi,

dat<-c(5,4,3,12,15)
rank(-dat)

[1] 3 4 5 2 1

rank(dat)

[1] 3 2 1 4 5

A.K.



----- Original Message -----
From: Jessy <jmahachie at gmail.com>
To: r-help at r-project.org
Cc: 
Sent: Wednesday, June 20, 2012 6:24 PM
Subject: [R] ranking a vector in R

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.

Regards,
Jessy

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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

Hope this helps.

Petr Savicky.

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)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595