[R] estimation of lambda and gamma with std errors for a weibull model

Fredrik Lundgren fredrik.lundgren at norrkoping.mail.telia.com
Wed Jan 14 21:10:51 CET 2004

Dear R experts,

How should lambda and gamma (with std.errors) be calculated for a weibull model with age as an independent predictor? I have assumed that this can be done with survreg with e. g. (summary(survreg(Surv(time, status) ~ age, dist = 'weibull')) ) and predict.survreg with e.g. (predict(model, se.fit = T,  newdata = data.frame(age = seq(50, 80, 5)) but unfortunately I'm uncapable to sort out how to get the lambda and gamma values (with std.errors). I haven't found any example of this in the help pages and would really appreciate  any help!

With best wishes and thanks in advance for any help

Fredrik Lundgren

More information about the R-help mailing list