Hi, thank you very much for your reply. The function pgpd() is from the package POT, and the 1.544 is the location parameter, 0.4477557 is the scale parameter and -0.50113 is the shape parameter, which can be both negtive or positive.
Vincent Goulet wrote: > > Le 07-07-11 à 07:56, livia a écrit : > >> >> Hi, I would like to use the following codes to plot the CDF for pareto >> distribution. Before doing this, I have plot the emperical one. >> >> x <- seq(1.6, 3, 0.1) >> lines(x,pgpd(x, 1.544,0.4477557,-0.50113), col="red") >> >> Could anyone give me some advice whether the above codes are correct? >> >> Many thanks. > > livia, > > You seem to be struggling with the Pareto distribution... The above > code seems correct, but you do not say where you took the pdpd() > function from. This makes it harder for us to help you. > > In you other message (https://stat.ethz.ch/pipermail/r-help/2007-July/ > 136137.html) you quote a negative scale parameter. The Pareto I know > has strictly positive shape and scale parameters. > > Perhaps can you retry with functions ppareto() or pgenpareto() of > package actuar. > > --- > Vincent Goulet, Associate Professor > École d'actuariat > Université Laval, Québec > [EMAIL PROTECTED] http://vgoulet.act.ulaval.ca > > ______________________________________________ > R-help@stat.math.ethz.ch 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://www.nabble.com/CDF-for-pareto-distribution-tf4061253.html#a11540928 Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@stat.math.ethz.ch 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.
