Thank you, it is what I was looking for: library(fitdistrplus) x<-rlnorm(100) res<-mledist(x, distr="lnorm") res
Anyway, the results do not provide confidence intervals, but mle estimates and the hessian matrix, whose extradiagonal elements are null... is it correct? http://www.weibull.com/LifeDataWeb/confidence_bounds_log.htm http://www.weibull.com/LifeDataWeb/confidence_bounds_log.htm I will investigate... David Scott-6 wrote: > > Krusty the Klown wrote: >> Dear all, >> a statistical question: how can I compute exact confidence intervals for >> the >> lognormal distribution parameters? I found something only on >> www.weibull.com www.weibull.com . Does exist a package in R which can >> compute them? >> Thanks in advance, >> KTK > > I think fitdistrplus can do this > > David Scott > -- > _________________________________________________________________ > David Scott Department of Statistics > The University of Auckland, PB 92019 > Auckland 1142, NEW ZEALAND > Phone: +64 9 923 5055, or +64 9 373 7599 ext 85055 > Email: d.sc...@auckland.ac.nz, Fax: +64 9 373 7018 > > Director of Consulting, Department of Statistics > > ______________________________________________ > 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. > > -- View this message in context: http://old.nabble.com/%28exact%29-confidence-bounds-for-lognormal-parameters-%5Cmu-and-%5Csigma-tp26394177p26404934.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.
