survfit.object {survival} | R Documentation |
This class of objects is returned by the survfit
class of functions
to represent a fitted survival curve.
Objects of this class have methods for the functions print
,
summary
, plot
, points
and lines
. The
print.survfit
method does more computation than is typical
for a print method and is documented on a separate page.
The following components must be included in a legitimate survfit
object.
time
etc. vectors corresponding to the first curve, the second curve,
and so on. The names of the elements are labels for the curves.
Survfit objects that contain multiple survival curves can be subscripted.
This is most often used to plot a subset of the curves.
Usually a single subscript will be used. In one particular case –
survival curves for multiple covariate values, from a Cox model that includes
a strata
statement – there is a matrix of curves and 2 subscripts may
be used.
(In this case summary.survfit
will also print the data as a matrix).
survfit
, plot.survfit
,
summary.survfit
, print.survfit
.