JointAI (version 0.6.1)

set_refcat: Specify reference categories for all categorical covariates in the model

Description

The function is a helper function that asks questions and, depending on the answers given by the user, returns the input for the argument refcats in the main analysis functions *_imp.

Usage

set_refcat(data, formula, covars, auxvars = NULL)

Arguments

data

a data.frame

formula

optional; model formula (used to select subset of relevant columns of data)

covars

optional; vector containing the names of relevant columns of data

auxvars

optional; formula containing the names of relevant columns of data that should be considered additionally to the columns occurring in the formula

Examples

# NOT RUN {
# Example 1: set reference categories for the whole dataset and choose answer option 3:
set_refcat(data = NHANES)
3

# insert the returned string as argument refcats
mod1 <- lm_imp(SBP ~ age + race + creat + educ, data = NHANES, refcats = 'largest')

# Example 2:
# specify a model formula
fmla <- SBP ~ age + gender + race + bili + smoke + alc

# write the output of set_refcat to an object
ref_mod2 <- set_refcat(data = NHANES, formula = fmla)
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2
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1

# enter the output in the model specification
mod2 <- lm_imp(formula = fmla, data = NHANES, refcats = ref_mod2, n.adapt = 0)
# }
# NOT RUN {
# }