"Wu, Tongtong" <[EMAIL PROTECTED]> writes: > I am taking a survival class. Recently I need to do the Nelson-Aalen > estimtor in R. I searched through the R help manual and internet, but could > not find such a R function. I tried another way by calculating the > Kaplan-Meier estimator and take -log(S). However, the function only > provides the summary of KM estimator but no estimated values. Could you > please help me with this? I would highly appreciate your great help!
It's the log of the Fleming-Harrington estimator that equals Nelson-Aalen. However, the main thing is that the survival package is peculiar in that it does such transformations as part of plot.survfit(). If you want the actual values of the N-A estimator, I don't think there's any other way besides extracting the survival curve values from the survfit object and taking logs. So: you should study the help pages for plot.survfit and survfit.object. -- O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ [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
