fill_dates: Fills down dates within a data frame that include a start and...

In amp.dm: Data Management Tools for Pharmacometrics

Fills down dates within a data frame that include a start and end date

Description

This function can be used in case a start and end date is known for dosing. This function fills down the dates so each date between start and end is placed on a separate row. Subsequently the dataset can be used to merge with available date information and impute missing dates.

Usage

fill_dates(data, start, end, tau = 1, repdat = 1)

Arguments

data	data frame for which the dates should be filled down
start	character identifying the start date (as date format) within the data frame
end	character identifying the end date (as date format) within the data frame
tau	integer with the tau in days (e.g. 2 for dosing every other day)
repdat	integer with repeats per day (e.g. 2 in case of twice daily dosing)

Value

a data frame with filled out dates

Author(s)

Richard Hooijmaijers

Examples

dfrm <- data.frame(ID=1:2,first=as.Date(c("2016-10-01","2016-12-01"), "%Y-%m-%d"),
                   last=as.Date(c("2016-10-03","2016-12-02"), "%Y-%m-%d"))
fill_dates(dfrm, "first", "last")
fill_dates(dfrm, "first", "last", 2, 3)

amp.dm documentation built on March 13, 2026, 5:08 p.m.