[R] Percentile rank for each element in list

[Ista Zahn]

Hi,
I think you want ecdf(), but read the help page because it works a
little different than you might expect.

ecdf.x <- ecdf(x)
ecdf.x(x)

Best,
Ista

On Tue, Sep 7, 2010 at 8:37 AM, mic <mikezian11 at gmail.com> wrote:
> Heeeelp
>
> Given this data
>  x <- c(1,5,100,300,250,200,550,900,1000)
>> quantile(x)
>  0%  25%  50%  75% 100%
>   1  100  250  550 1000
>
> When I run the quantile, I can only know the value of the nth
> percentile
>
> I want to know what's the percentile position of each items in the
> list
> Sample
> 1 = 100% on the list has 1 or more
> 5 = more than x% on the list has 5 or more
> 100  = more than x% on the list has 100 or more
> 250 = more than 50% on the list has 250 or more
> etc....
>
> Thanks in advance
>
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-- 
Ista Zahn
Graduate student
University of Rochester
Department of Clinical and Social Psychology
http://yourpsyche.org