Surv2 {survival}R Documentation

Create a survival object

Description

Create a survival object from a timeline style data set. This will almost always be the response variable in a formula.

Usage

Surv2(time, event)

Arguments

time

a timeline variable, such as age, time from enrollment, date, etc.

event

the outcome at that time. This can be a 0/1 variable, TRUE/FALSE, or a factor. If the latter, the first level of the factor corresponds to ‘no event was observed at this time’.

Details

When used in a coxph or survfit model, Surv2 acts as a trigger to internally convert a timeline style data set into counting process style data, which is then acted on by the routine.

Value

An object of class Surv2. There are methods for print, is.na and subscripting.

See Also

coxph, survfit


[Package survival version 3.2-7 Index]