[R] Percentiles in R

Julian Burgos jmburgos at u.washington.edu
Tue Sep 11 17:55:17 CEST 2007


Hola Jose Luis,

Sure, you can use quantile().  Use the probs argument.  For example, to 
get the median do

quantile(X,probs=0.5).

Do ?quantile to learn about the different type of quantiles calculated 
by the funcion.

Saludos,

Julian


Jose Luis Aznarte M. wrote:
> Hi there! Still struggling to translate Matlab code into R's tsDyn package.
> Here is my question: Is there in R an equivalent function to Matlab's 
> prctile()? To the moment I thought it was quantile(), but I just 
> realized I was wrong. The definition of the Matlab function:
>
> prctile
> Percentiles of a sample
> SyntaxY = prctile(X,p)
> Description
> Y = prctile(X,p) calculates a value that is greater than p percent of 
> the values in X. The values of p must lie in the interval [0 100]. For 
> instance, if p = 50 then Y is the median of X
>
> Thanks!!
>
>   

-- 
Julian M. Burgos

Fisheries Acoustics Research Lab
School of Aquatic and Fishery Science
University of Washington

1122 NE Boat Street
Seattle, WA  98105 

Phone: 206-221-6864



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