R devel - Jun 2002 - Fwd: Re: Tcl8.0.4 missing function?! (PR#1640)

>From: Peter Dalgaard BSA <p.dalgaard@biostat.ku.dk>
>To: "RenE J.V. Bertin" <rjvbertin@hotmail.com>
>Subject: Re: Tcl8.0.4 missing function?! (PR#1640)
>Date: 12 Jun 2002 19:37:21 +0200
> >
> > From help(quantile):
> >
> > ...
> >
> >     `quantile(x,p)' as a function of `p' linearly interpolates
the
> >      points ( (i-1)/(n-1), ox[i] ), where `ox <- order(x)' (the
``order
> >      statistics'') and `n <- length(x)'.
> >
> >      This gives `quantile(x, p) == (1-f)*ox[i] + f*ox[i+1]', where
`r
> >      <- 1 + (n-1)*p', `i <- floor(r)', `f <- r -
i' and `ox[n+1] :> >      ox[n]'.
> >
> > I think that what is meant is 'ox <- x[order(x)]'?! When I
do that,
> > the values from the above formulae correspond to what quantile() gives
> > me...!


RenE J.V. Bertin
College de France/LPPA
11, place Marcelin Berthelot
75005 Paris, France

_________________________________________________________________



-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To:
r-devel-request@stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._