Google for the gfcure package on statlib. I have not used it myself and am not entirely sure whether it works on R or just S.
Roger Dungan <roger.dungan <at> canterbury.ac.nz> writes: : : Dear r-help subscribers, : : A couple of weeks ago I sent the following message to the r-help mail : list. It hasn't generated any response, and I could really use some help : on this. Anyone able to help? : : Thanks again, : : Roger Dungan : : >> : I am working on some survival analysis of some interval censored failure : time data in R. I have done similar analysis before using PROC LIFEREG : in SAS. In that instance, a gamma survival function was the optimum : parametric model for describing the survival and hazard functions. I : would like to be able to use a gamma function in R, but apparently the : survival package does not support this distribution. I have been : googling around for some help, and have found some threads to a similar : question posted to the R-Help list in October last year. Because I am a : bit of a survival analysis and R newbie, I didn't really understand the : discussion thread. : : I've been working with a Weibull distribution, thus: : : >leafsurv.weibull<-survreg(Surv(minage, maxage, censorcode, type = : >"interval")~1, dist = "weib") : : And I guess I'd like to be able to do something that's the equivalent of : : >leafsurv.gamma<-survreg(Surv(minage, maxage, censorcode, type = : >"interval")~1, dist = "gamma") : : At least one of the R-help listserver comments mentioned using : survreg.distributions to customise a gamma distribution, but I can't : figure out how to make this work with the resources (intellectual and : bibliographical!) that I have available. : : With thanks in advance for your help, : : Dr Roger Dungan : School of Biological Sciences : University of Cantebury : Christchurch, New Zealand : ph +64 3 366 7001 ext. 4848 : fax +64 3 354 2590 : : ______________________________________________ : R-help <at> 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 : : ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
