appendbreak: Appends specified break to the data
Description
A custom function to insert rows in long data with new
pseudo-observations that are being done on the specified
break ages. There should be a column called first
in data with logical data that codes whether the
current row is the first for subject id.
Furthermore, the function assumes that columns
age, occ, hgt.z, wgt.z and
bmi.z are available. This function is used on the
tbc data in FIMD chapter 9. Check that out to see
it in action.Usage
appendbreak(data, brk, warp.model = warp.model,
id = NULL, typ = "pred")Arguments
data
A data frame in the long long format
brk
A vector of break ages
warp.model
A time warping model
typ
Label to signal that this is a newly added
observation
Value
- A long data frame with additional rows for the break ages