tccov {event} | R Documentation |
tccov(y, x, id)
y |
Vector of times. |
x |
Vector covariate. |
id |
Vector of corresponding individual identifiers for who had which sequence of times. |
tccov
creates a vector of length sum(y)
of time-constant
covariates for use with ehr
. id
must be numbered
consecutively. x
must have one value for each distinct id
,
J.K. Lindsey
bp
, ehr
,
ident
, pp
,
tpast
, ttime
,
tvcov
.
y <- c(5,3,2,4) id <- c(1,1,2,2) x <- c(5.2,3.1) xcov <- tccov(y, x, id) xcov