parse_formula: Parse 'cmprsk2' formula

In raredd/cmprsk2: cmprsk2

Parse cmprsk2 formula

Description

Parse crr2 or cuminc2 formulas into usefule pieces and optionally check data source for errors.

Usage

parse_formula(formula, data = NULL, name = NULL)

Arguments

formula	a valid crr2 or cuminc2 formula
data, name	optional data frame and data name to check variables from formula

Value

A list with the following elements:

formula	the unchanged formula coerced to a formula object
lhs_vars	all variable names found on the left-hand side of formula
rhs_vars	all variable names found on the right-hand side of formula with any factor(), strata(), etc. modifications removed
lhs	the left-hand side of formula as it appears
rhs	the right-hand side of formula as it appears with any factor(), strata(), etc. included
ftime	variable in data defining times
fstatus	variable in data defining censoring and failure events
cencode	censor code, a value of data$fstatus
failcode	failure code of interest if given, a value of [data$fstatus] (required for a crr2 model but optional for cuminc2)
cov1	cov1 variable names to be evaluated by model.matrix as they appear
cov2	cov2 variable names (functions of time) to be evaluated by model.matrix as they appear
strata	strata variable names

raredd/cmprsk2 documentation built on March 29, 2024, 5:34 a.m.