R: Ratetable reference in formula

ratetable {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)

    # The data set does not have entry date, use the midpoint of the study
    efit <- survexp(~ ratetable(sex=sex,age=age*365.35,year=as.Date('1979/1/1')) +
                sex, data=pbc,  times=(0:24)*182)
    ## Not run:
    plot(fit, mark.time=F, xscale=365.25, xlab="Years post diagnosis",
            ylab="Survival")
    lines(efit, col=2, xscale=365.25) # Add the expected survival line

    ## End(Not run)

[Package survival version 2.37-7 Index]