Interface CoxphOptions

Cluster labels, one per observation, for the robust variance (R's cluster): the observations of a cluster are treated as correlated. Rows with a missing label (null or NaN) are dropped, like rows with a missing stratum. Without it, each observation is its own cluster. At least two clusters are needed.

Confidence level of the intervals of exp(coef). Default 0.95.

See CoxphControl.

Starting coefficients. Default 0.

Covariates whose values all lie in this set are neither centred nor scaled. Default [-1, 0, 1].

Whether to use the robust (Lin-Wei sandwich) variance. Default as R: true when cluster is given or some case weight is not an integer, else false. With false a cluster is ignored (with R's warning).

Stratum labels, one per observation: a separate baseline hazard per stratum.

Handling of tied event times. Default "efron".

Case weights (positive). A weight that is not an integer switches the robust variance on (see robust).