center_mlm {psycCleaning}

Centering for multilevel analyses

Description

This function will group mean centered the scores at the level 1 and create a mean score for each group at L2.

Usage

center_mlm(data, cols, group, keep_original = TRUE)

Arguments

data

A data.frame or a data.frame extension (e.g. a tibble).

cols

Columns that need to be centered. See 'dplyr::dplyr_tidy_select' for available options.

group

the grouping variable. Must be character.

keep_original

default is 'TRUE'. Set to 'FALSE' to remove original columns

Value

An object of the same type as .data. The output has the following properties: 1. Columns from .data will be preserved 2. Columns with L1 scores that are group-mean centered. 3. Columns with L2 aggregated means.

Examples

center_mlm(iris,dplyr::ends_with('Length'),group = 'Species')