[R] Obtaining x-values from ECDF

[Henrique Dallazuanna]

You are rigth, I'm sorry.

-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O


On 18/11/2007, David Winsemius <dwinsemius at comcast.net> wrote:
> That would give the x-values. He asked for the y-values at a particular x.
>
>  Instead he might try:
>
> quantile(cawaocc$LEFF80, probs=0.8)
>
> or
>
> quantile(knots(Fn), probs=0.8)
>
> --
> David Winsemius
>
> Henrique Dallazuanna wrote:
> > try this:
> >
> > knots(cawa.cdp)
> >
> >
> On 18/11/2007, Benjamin Zuckerberg <bzuckerb at syr.edu> wrote:
> > >
> > > Dear Group,
> > >
> > > I am using the ecdf function as follows:
> > >
> > > cawa.cdp <- ecdf(cawaocc$LEFF80)
> > >
> > > summary(cawa.cdp)
> > >
> > > Empirical CDF:    223 unique values with summary
> > >     Min. 1st Qu.  Median    Mean 3rd Qu.    Max.
> > > 0.07918 1.35700 1.68600 1.61000 1.91200 2.70000
> > >
> > > I can see by the summary that the y-value for the 3rd quartile is 1.912.
> > >
> > > How can I obtain the x-value for a specified y-value (e.g., 0.8)?
>
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