R: Convert date objects to ratetable form

ratetableDate {survival} | R Documentation

## Convert date objects to ratetable form

### Description

This method converts dates from various forms into the internal form used in `ratetable` objects.

### Usage

    ratetableDate(x)

### Arguments

`x` | a date. The function currently has methods for Date, date, POSIXt, timeDate, and chron objects.

### Details

This function is useful for those who create new ratetables, but is normally invisible to users. It is used internally by the `survexp` and `pyears` functions to map the various date formats; if a new method is added then those routines will automatically be adapted to the new date type.

### Value

a numeric vector, the number of days since 1/1/1960.

### Author(s)

Terry Therneau

### See Also

`pyears`, `survexp`

[Package survival version 2.37-7 Index]