Extract the design matrix used to train a Cox model. Should contain the time of event, the type of event, the variable for the linear predictor, the strata variables and the date of entry (in case of delayed entry).
coxModelFrame(object, center)# S3 method for coxph
coxModelFrame(object, center = FALSE)
# S3 method for cph
coxModelFrame(object, center = FALSE)
# S3 method for phreg
coxModelFrame(object, center = FALSE)
The fitted Cox regression model object either
obtained with coxph
(survival package), cph
(rms package), or phreg
(mets package).
[logical] Should the variables of the linear predictor be added ?