check.formula_terms: Check Correctness of Formula Terms

In TimeDepFrail: Time Dependent Shared Frailty Cox Model

Check Correctness of Formula Terms

Description

The function controls that the terms composing the formula object provided in input to the main model are correct. They must include:

• response variable on the left hand side

• covariates (numerical or categorical) on the right hand side

• cluster variable (categorical) on the right hand side and specified by the function 'cluster()'

Moreover, it controls that the covariates are contained in the dataset provided.

Usage

check.formula_terms(formula, data)

Arguments

formula	Formula object specifying the relationship between the time-to-event, the covariates and the cluster variables.
data	Dataset in which these variables can be found.

Value

An error if any condition is not satified.

TimeDepFrail documentation built on April 11, 2025, 5:41 p.m.