Try
quantile(x, .1, type=1)
or read
?quantile
for other options.
url: www.econ.uiuc.edu/~roger Roger Koenker
email [EMAIL PROTECTED] Department of Economics
vox: 217-333-4558 University of Illinois
fax: 217-244-6678 Champaign, IL 61820
On Sep 11, 2007, at 12:09 PM, Jose Luis Aznarte M. wrote:
> Thank you all! But the problem is that quantile() returns "how
> many
> data" are greater than p percent, and not a value in the domain of the
> vector under scrutiny. For example, I have a vector
>
>> x
> [1] "-0,39559" "1,1916" "0,23214" "1,656" "-0,3439"
> "-0,50568"
> [7] "0,52281" "0,96209" "0,0087242" "-0,030727" "1,0935"
> "0,35159"
> [13] "0,79229" "0,81791" "0,3186" "1,0165" "0,65567"
> "-0,56474"
> [19] "-0,34662" "0,70435" "-0,73285" "-0,60452" "-0,92526"
> "-0,296"
> [25] "0,51298" "0,38654" "0,32469" "-0,92555" "0,53023"
> "0,050059"
> [31] "1,09" "-0,35462" "0,37674" "1,1409" "0,072098"
> "1,4234"
> [37] "1,43" "0,68532" "0,078089" "0,61944"
>
> and, if I want to see the 10th percentile, in Matlab I go
>
>>> prctile(x, 10)
> ans =
> -0.4067
>
> But in R:
>
>> quantile(x, probs=.1)
> 10%
> 51.5
>
> I need to obtain -0.4067, do you see what I mean? Thanks a lot again!!
>
> Jose Luis Aznarte M. escribió:
>> 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!!
>>
>>
>
>
> --
> -- --
> Jose Luis Aznarte M. http://decsai.ugr.es/~jlaznarte
> Department of Computer Science and Artificial Intelligence
> Universidad de Granada Tel. +34 - 958 - 24 04 67
> GRANADA (Spain) Fax: +34 - 958 - 24 00 79
>
> ______________________________________________
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