rank() would do it:
> x <- c(1,2,2,2,2,3,4,4,5,5)
> rank(x, ties="max")/length(x) * 100
[1] 10 50 50 50 50 60 80 80 100 100
as would ecdf()
> ecdf(x)(x)*100
[1] 10 50 50 50 50 60 80 80 100 100
Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com
> -----Original Message-----
> From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
> Behalf
> Of greggal...@gmail.com
> Sent: Sunday, November 04, 2012 7:22 PM
> To: r-help@r-project.org
> Subject: [R] Replace array with percentile values
>
> Hi:
>
> I have an array of measurements, that I've been doing linear
> regression model and AI models on. Because there are many errors and
> the values are "ill-formed" I would like to copy the array, but
> replace each value with the PERCENTILE of that value, in the original
> array.
>
> i.e.
>
> mesments$V1: 9, 77, -1
>
> would become: mesmentsCopy$V1: 50, 100, 0
>
> The actual array has many more rows and columns, of course.
>
> Cheers,
>
> Greg Allen
> Freelance Techno-Slave
> SLC, Utah
>
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