Extract the variance covariance matrix of the beta from a Cox model
coxVarCov(object)# S3 method for cph
coxVarCov(object)
# S3 method for coxph
coxVarCov(object)
# S3 method for phreg
coxVarCov(object)
The fitted Cox regression model object either
obtained with coxph (survival package), cph
(rms package), or phreg (mets package).
Brice Ozenne broz@sund.ku.dk
Should return NULL if the Cox model has no covariate.
The rows and columns of the variance covariance matrix must be named with the names used in the design matrix.