R help - Feb 2009 - Remove top-K elements in Vector

Hi all,

Suppose I hve this vector:
> x
 [1]  3  4  7 17 22 12 15 12  3  3  1  1

How can I remove the top-3 element.
Yielding only:
[1]  17 22 12 15 12  3  3  1  1

- Gundala Viswanath
Jakarta - Indonesia

try this:

x[-(1:3)]
# or
tail(x, -3)


Best,
Dimitris


Gundala Viswanath wrote:
> Hi all,
> 
> Suppose I hve this vector:
> 
>> x
>  [1]  3  4  7 17 22 12 15 12  3  3  1  1
> 
> How can I remove the top-3 element.
> Yielding only:
> [1]  17 22 12 15 12  3  3  1  1
> 
> - Gundala Viswanath
> Jakarta - Indonesia
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
> 
-- 
Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus University Medical Center

Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands
Tel: +31/(0)10/7043478
Fax: +31/(0)10/7043014

Have a look at ?tail

tail(x, -3) should do the trick.

HTH,

Thierry


------------------------------------------------------------------------
----
ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature
and Forest
Cel biometrie, methodologie en kwaliteitszorg / Section biometrics,
methodology and quality assurance
Gaverstraat 4
9500 Geraardsbergen
Belgium 
tel. + 32 54/436 185
Thierry.Onkelinx at inbo.be 
www.inbo.be 

To call in the statistician after the experiment is done may be no more
than asking him to perform a post-mortem examination: he may be able to
say what the experiment died of.
~ Sir Ronald Aylmer Fisher

The plural of anecdote is not data.
~ Roger Brinner

The combination of some data and an aching desire for an answer does not
ensure that a reasonable answer can be extracted from a given body of
data.
~ John Tukey

-----Oorspronkelijk bericht-----
Van: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
Namens Gundala Viswanath
Verzonden: woensdag 18 februari 2009 9:20
Aan: r-help at stat.math.ethz.ch
Onderwerp: [R] Remove top-K elements in Vector

Hi all,

Suppose I hve this vector:
> x
 [1]  3  4  7 17 22 12 15 12  3  3  1  1

How can I remove the top-3 element.
Yielding only:
[1]  17 22 12 15 12  3  3  1  1

- Gundala Viswanath
Jakarta - Indonesia

______________________________________________
R-help at r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

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