`cox_obj_function.Rd`

Returns the elastic net objective function value for Cox regression model.

`cox_obj_function(y, pred, weights, lambda, alpha, coefficients, vp)`

- y
Survival response variable, must be a

`Surv`

or`stratifySurv`

object.- pred
Model's predictions for

`y`

.- weights
Observation weights.

- lambda
A single value for the

`lambda`

hyperparameter.- alpha
The elasticnet mixing parameter, with \(0 \le \alpha \le 1\).

- coefficients
The model's coefficients.

- vp
Penalty factors for each of the coefficients.