[R] ecdf

Downey, Patrick PDowney at urban.org
Mon Apr 19 15:12:16 CEST 2010

Hi Thierry,

That worked perfectly. Thanks for the suggestion.

For reference, in the documentation, it never lists {Hmisc}'s function as
starting with E instead of e. I don't know who's in charge of
documentation, but that should probably be corrected.

Thanks again.


-----Original Message-----
From: ONKELINX, Thierry [mailto:Thierry.ONKELINX at inbo.be] 
Sent: Monday, April 19, 2010 9:08 AM
To: Downey, Patrick; R help
Subject: RE: [R] ecdf

R is case sensitive. ecdf() is in the stats package, Ecdf() is in Hmisc.
So you want Ecdf(x,what='1-F')

ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek
team Biometrie & Kwaliteitszorg
Gaverstraat 4
9500 Geraardsbergen

Research Institute for Nature and Forest
team Biometrics & Quality Assurance
Gaverstraat 4
9500 Geraardsbergen

tel. + 32 54/436 185
Thierry.Onkelinx at 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
~ John Tukey

> -----Oorspronkelijk bericht-----
> Van: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] Namens Downey, Patrick
> Verzonden: maandag 19 april 2010 15:04
> Aan: R help
> Onderwerp: [R] ecdf
> Hello,
> I'd like to plot an empirical cumulative distribution 
> function, except instead of the fraction of values < x, I'd 
> like the fraction of values > x.
> I think this can be done using the ecdf function in {Hmisc}. 
> I installed the package and loaded it. However, when 
> following the example given in the documentation, I get an error:
> x <- rnorm(100)
> ecdf(x,what='1-F')
> Error in ecdf(x, what = "1-F") : unused argument(s) (what = "1-F")
> I believe that this is because R is attempting to access the 
> ecdf function in base R, which does not have the what option. 
> Am I correct, and if so, how can I change that?
> Note: I also tried to "do it myself" without the {Hmisc} ecdf 
> function, and couldn't figure out a way. 
> x2 <- 1-ecdf(x)
> doesn't work, and neither does
> x2 <- rep(0,times=100)
> for(i in 1:100){
>   x2[i] <- 1-ecdf(x)[i]
> }
> Both result in errors.
> Thanks in advance for any suggestions you can offer.
> -Mitch
> ______________________________________________
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> 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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