Check if glmnet should call cox.path

Helper function to check if glmnet() should call cox.path().

Usage

use.cox.path(x, y)

Arguments

x

Design matrix.

y

Response variable.

Value

TRUE if cox.path() should be called, FALSE otherwise.

Details

For family="cox", we only call the original coxnet() function if (i) x is not sparse, (ii) y is right-censored data, and (iii) we are not fitting a stratified Cox model. This function also throws an error if y has a "strata" attribute but is not of type "stratifySurv".