| dataprep {intccr} | R Documentation |
Data manipulation
Description
The function dataprep reshapes data from a long format to a ready-to-use format to be used directly in the function ciregic.
Usage
dataprep(data, ID, time, event, Z)
Arguments
data |
a data frame that includes the variables named in the |
ID |
a variable indicating individuals' ID |
time |
a variable indicating observed time points |
event |
a vector of event indicator. If an observation is righ-censored, |
Z |
a vector of variables indicating name of covariates |
Details
The function dataprep provides a ready-to-use data format that can be directly used in the function ciregic. The returned data frame consists of id, v, u, c, and covariates as columns. The v and u indicate time window with the last observation time before the event and the first observation after the event. The c represents a type of event, for example, c = 1 for the first cause of failure, c = 2 for the second cause of failure, and c = 0 for the right-censored. For individuals having one time record with the event, the lower bound v will be replaced by zero, for example (0, v]. For individuals having one time record without the event, the upper bound u will be replaced by Inf, for example (v, Inf].
Value
a data frame
Author(s)
Jun Park, jun.park@alumni.iu.edu
Giorgos Bakoyannis, gbakogia@iu.edu
Examples
library(intccr)
dataprep(data = longdata, ID = id, time = t, event = c, Z = c(z1, z2))