survival (version 2.11-4)

ratetable: Ratetable reference in formula

Description

This function matches variable names in data to those in a ratetable for survexp

Usage

ratetable(...)

Arguments

...

tags matching dimensions of the ratetable and variables in the data frame (see example)

Value

• A data frame

See Also

survexp,survexp.us,is.ratetable

Examples

data(pbc)
fit <- survfit(Surv(time, status) ~ sex, pbc,subset=1:312)
if (require(date)){
tdata <- data.frame(agedays=pbc$age*365.24, sex=pbc$sex +1,
		    year= rep(mdy.date(1,1,1976), nrow(pbc)))
tdata<-tdata[1:312,] ## only the randomised people, with no missing data
data(ratetables)
efit <- survexp(~ sex+ratetable(sex=sex,age=agedays,year=year), data=tdata, ratetable=survexp.us, times=(0:24)*182)
}