extractVars: Extract or remove variables from a 'GADSdat'.

In eatGADS: Data Management of Large Hierarchical Data

Extract or remove variables from a GADSdat.

Description

Extract or remove variables and their meta data from a GADSdat object.

Usage

extractVars(GADSdat, vars)

removeVars(GADSdat, vars)

Arguments

GADSdat	GADSdat object.
vars	A character vector containing the variables names in the GADSdat.

Details

Both functions simply perform the variable removal or extraction from the underlying data.frame in the GADSdat object followed by calling updateMeta.

Value

Returns a GADSdat object.

Examples

## create an example GADSdat
example_df <- data.frame(ID = 1:4,
                        age = c(12, 14, 16, 13),
                        citizenship1 = c("German", "English", "Polish", "Chinese"),
                        citizenship2 = c(NA, "German", "Chinese", "Polish"),
                        stringsAsFactors = TRUE)
gads <- import_DF(example_df)

## remove variables from GADSdat
gads2 <- removeVars(gads, vars = c("citizenship2", "age"))

## extract GADSdat with specific variables
gads3 <- extractVars(gads, vars = c("ID", "citizenship1"))

eatGADS documentation built on June 8, 2025, 12:42 p.m.