That would give the x-values. He asked for the y-values at a particular x.
Instead he might try: quantile(cawaocc$LEFF80, probs=0.8) or quantile(knots(Fn), probs=0.8) -- David Winsemius Henrique Dallazuanna wrote: > try this: > > knots(cawa.cdp) > > On 18/11/2007, Benjamin Zuckerberg <[EMAIL PROTECTED]> wrote: > > > > Dear Group, > > > > I am using the ecdf function as follows: > > > > cawa.cdp <- ecdf(cawaocc$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)? ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
