2 hypotheses: 1. Homework problem 2, extrapolation
Cheers, Bert On Mon, Nov 28, 2011 at 3:35 AM, Frank Harrell <f.harr...@vanderbilt.edu> wrote: > Note that fitting to the ECDF will result in a distribution estimator that > has the same mean squared error as the ECDF. That makes it difficult to see > the value of fitting. > Frank > > Lathouri, Maria wrote >> >> Dear all, >> >> I need to plot an cumulative distribution plot of a variable and then to >> fit a distribution to that, probably a weibull or lognormal. >> >> I have plotted the ecdf as >>> plot(ecdf(x)) >> >> but I haven't managed to fit the distribution. I have as well attached the >> data. >> >> I would appreciate if you could help me on that. >> >> Thank you. >> >> Kind regards >> Maria >> >> ______________________________________________ >> R-help@ 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. >> > > > ----- > Frank Harrell > Department of Biostatistics, Vanderbilt University > -- > View this message in context: > http://r.789695.n4.nabble.com/fitting-a-distribution-to-a-ecdf-plot-tp3357015p4114902.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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. > -- Bert Gunter Genentech Nonclinical Biostatistics Internal Contact Info: Phone: 467-7374 Website: http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm ______________________________________________ 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.