add_index: Calculate the mean value of multiple items

In volker: High-Level Functions for Tabulating, Charting and Reporting Survey Data

Calculate the mean value of multiple items

Description

Usage

add_index(data, cols, newcol = NULL, cols.reverse, clean = TRUE)

Arguments

data	A dataframe.
cols	A tidy selection of item columns.
newcol	Name of the index as a character value. Set to NULL (default) to automatically build a name from the common column prefix, prefixed with "idx_".
cols.reverse	A tidy selection of columns with reversed codings.
clean	Prepare data by data_clean.

Value

The input tibble with an additional column that contains the index values. The column contains the result of the alpha calculation in the attribute named "psych.alpha".

Examples

ds <- volker::chatgpt
volker::add_index(ds, starts_with("cg_adoption"))

volker documentation built on April 12, 2025, 9:16 a.m.