addPeriods: Create longitudinal/panel data
Description
Create longitudinal/panel data
Usage
addPeriods(dtName, nPeriods = NULL, idvars = "id", timevars = NULL, timevarName = "timevar")
Arguments
dtName
Name of existing data table
nPeriods
Number of time periods for each record
idvars
Names of index variables (in a string vector) that will be
repeated during each time period
timevars
Names of time dependent variables. Defaults to NULL.
timevarName
Name of new time dependent variable
Value
An updated data.table that that has multiple rows
per observation in dtName