Hello,

I am trying to compute the mdeian of the survival time from the function
survfit:

> fit <- survfit(Surv(time, status) ~ 1)
> fit
Call: survfit(formula = Surv(time, status) ~ 1)

records   n.max n.start  events  median 0.95LCL 0.95UCL
    111     111     111      20      NA      NA      NA

The results is NA? the fit$surv gives values between 1 and 0.749! Am I doing
this correct? Is there a correct way to do this?

Many thanks for your help,
Dunia

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