Model.matrix method for yppe models — model.matrix.yppe • YPPE

Reconstruct the model matrix (or matrices if the alternative formulation of the YP model is used) for a yppe model.

Usage

# S3 method for yppe
model.matrix(object, ...)

Arguments

object: an object of the class yppe.
...: further arguments passed to or from other methods.

Value

The model matrix (or matrices) for the fit.

Examples

if (FALSE) {
fit <- yppe(Surv(time, status)~arm, data=ipass)
model.matrix(fit)
}