as.data.table.ratetable: Coerce a ratetable object to data.table
Description
ratatable objects used in e.g. survival and relsurv
can be conveniently coerced to a long-format data.frame.
However, the names and levels of variables in the result
may not match names and levels of variables in your data.
Usage
## S3 method for class 'ratetable':
as.data.table(x, ...)