Bluder Olivia <olivia.bluder <at> k-ai.at> writes: > > Hello, > > I'm trying to calculate the Maximum likelihood estimators for a dataset > which contains censored data. > > I started by using the function "nlm", but isn't there a separate method > for doing this for e.g. the "weibull" and the "log-normal" distribution? > > Thanks, > > Olivia
This is not *quite* enough detail about what you want to do. Can you (as the posting guide suggests!) give us a small example of what you want to do? You may be able to do this via the survreg() command in the survival package, or you may want to do it yourself by constructing a log-likelihood function with dweibull() for uncensored data and pweibull() for censored data [or dlnorm/plnorm]. Ben Bolker ______________________________________________ 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.
