tvctomat(tvcov, names=NULL, index=NULL, tccov=NULL, oldtvcov=NULL)
tvcov
| A list of matrices with time-varying covariate values for each individual (one column per variable), one matrix or dataframe of such covariate values (when there is only one such covariate), or an object of class, tvcov. |
names
| The names of the time-varying covariates in tvcov (if the matrices do not have column names) or the name of the time-constant covariate. |
index
| The index numbers or names of variables in tvcov, with that class, for which an interaction is to be added or one such number or name for an interaction with a time-constant covariate. |
oldtvcov
| An object of class, tvcov, to which tvcov is to be added. |
tvctovmat
transforms a list of matrices with time-varying
covariates for each individual or one matrix or dataframe of such
covariate values into an object of class, tvcov, or combines two such
objects. It can also add interactions among covariates.
Such objects can be printed. Methods are available for extracting the covariates and their names.
gettvc
, read.list
, restovec
,
rmna
, tcctomat
.z <- matrix(rpois(20,5),ncol=5) tvctomat(z)