Arguments
surv
the estimate of survival at time t+0.
This may be a vector or a matrix.
n.risk
the number of subjects who contribute at this time.
time
the time points at which the curve has a step.
std.err
the standard error of the cumulative hazard or -log(survival).
strata
if there are multiple curves, this component gives the number of elements of
the time
etc. vectors corresponding to the first curve,
the second curve,
and so on. The names of the elements are labels for the curves.
method
the estimation method used. One of "Ederer", "Hakulinen",
or "conditional".
na.action
the returned value from the na.action function, if any. It will be used
in the printout of the curve, e.g., the number of observations deleted due
to missing values.
call
an image of the call that produced the object.