eha (version 2.4-4)

risksets: Finds the compositions and sizes of risk sets

Description

Focus is on the risk set composition just prior to a failure.

Usage

risksets(x, strata = NULL, max.survs = NULL, members = TRUE)

Arguments

x

A Surv object.

strata

Stratum indicator.

max.survs

Maximum number of survivors in each risk set. If smaller than the 'natural number', survivors are sampled from the present ones. No sampling if missing.

members

If TRUE, all members of all risk sets are listed in the resulting list, see below.

Value

A list with components

Details

If the input argument max.survs is left alone, all survivors are accounted for in all risk sets.

See Also

table.events, coxreg.

Examples

 enter <- c(0, 1, 0, 0)
 exit <- c(1, 2, 3, 4)
 event <- c(1, 1, 1, 0)
 risksets(Surv(enter, exit, event))