tvc.example: Creates an example of a matrix of time-varying covariates
Description
Given a set of (non-time-varying) covariates, creates a simple example
of a matrix of time-varying covariates that can be used as input data
for the mHR2.tvc function.
Usage
tvc.example(Y1, Y2, Delta1, Delta2, X)
Value
A list containing the following elements:
ids:
A vector of ids
X.tv:
Time-varying covariate matrix
Arguments
Y1, Y2
Vectors of event times (continuous).
Delta1, Delta2
Vectors of censoring indicators (1=event,
0=censored).
X
Matrix of covariates (continuous or binary).
Details
For each (non-time-varying) covariate in X, two time-varying
covariates are created. The first time-varying covariate is equal to
Xlog(T1), and the second is equal to Xlog(T2). (If T=0, then the
time-varying covariate is set to be 0.) A vector of ID numbers and a
matrix of time-varying covariates are created in a format that can be
passed to the mHR2.tvc function.