[R] Questions concerning survival analysis

[Ruth Meili]

Good morning everyone (or maybe good evening)

Is there a counterpart to the s-plus function "probplot" (which
provides a qq-plot for "survreg"-objects)? Or do exist other
(rather simple) possibilities to check the assumptions of the
distribution?

I have another question to the author(s) of summary.survreg:
Why does summary(...,times=sort(x)) not give the same result as
summary(...,censored=TRUE) ? Example:

###
library(survival)

x <-   c(1,1,2,4,4,4,6,9)
status <- c(1,0,1,1,1,0,1,1) 

r.sf <- survfit(Surv(x, status)~1, type='kaplan-meier',conf.type="none")

summary(r.sf,times=sort(x))
summary(r.sf,censored=TRUE) # the censored data are not listed (?)
###

regards,
Ruth Meili

-- 
Ruth Meili <meili at stat.math.ethz.ch>
Seminar fuer Statistik, LEO D6
ETH (Federal Inst. Technology)	8092 Zurich	 SWITZERLAND
phone: x-41-1-632-4684		fax: x-41-1-632-1228
http://stat.ethz.ch/~meili/
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