find_ccc: Find cluster-constant covariates in a data set.

In mermboost: Gradient Boosting for Generalized Additive Mixed Models

Find cluster-constant covariates in a data set.

Description

This function gives out logical indicators whether a variable is cluster-constant.

Usage

find_ccc(df, id_char)

Arguments

df	some data frame
id_char	a character which is the column name for the cluster identifier.

Details

For uncorrected boosting of a mixed model the estimates for cluster constant covariates might be biased as part of their effect is held in the random effects. This bias is corrected by the underlying mermboost package.

Value

Gives a logical vector that indicates which variables of the dataframe have the same realisation for all observations of one cluster/individual.

See Also

glmermboost and mermboost

Examples

data(Orthodont)
find_ccc(Orthodont, "Subject")

mermboost documentation built on April 4, 2025, 1:41 a.m.