the standard error of the quantile

Then see the latter part of my note.   I think also that, at least for the
median, the survival package will compute it more quickly for inclusion in a
bootstrap loop.  Note that you forgot to state require(survival) or
library(survival) below.
Frank

Thanks for your help.
But I need to estimator the standard error of the quantile in "survival
analysis", because my data is censored.
For example~


T<-c(84,240,261,332,348,437,521,565)
S<-c(0,1,1,0,1,0,1,0)  ##0 for censoed; 1 for event
G<-rep(1,8)

ori_s.surv<-survfit(Surv(T,S)~G)

-----
Frank Harrell
Department of Biostatistics, Vanderbilt University
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