[R] error bars on survival curve

Murray Pung mcpung at gmail.com
Sun Jun 17 06:18:54 CEST 2007


I am using plot(survfit(Surv(time,status) ~...) and would like to add
error bars rather than the confidence intervals. Am I able to do this
at specified times? e.g. when time = 20 & 40.


leukemia.surv <- survfit(Surv(time, status) ~ x, data = aml)
plot(leukemia.surv, lty = 2:3,xlim = c(0,50))
#can i add error bars at times 20 & 40?
legend(100, .9, c("Maintenance", "No Maintenance"), lty = 2:3)


Thanks
Murray
-- 
Murray Pung



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