ratetable              package:survival              R Documentation

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:

     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

     efit <- survexp(~ sex+ratetable(sex=sex,age=agedays,year=year), data=tdata, ratetable=survexp.us, times=(0:24)*182)
     }

