Indexation

In ilabelled: Simple Handling of Labelled Data

knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>"
)

library(ilabelled)

Indexation

One of the fundamental features of i_labelled objects is that both underlying values and value labels can be used for logical operations.

The following rules must be observed when indexing i_labelled objects:

1. If numerical values are used for the indexation of numerical i_labelled data, the underlying numerical values of the i_labelled data are used for the comparison.
2. If character values or values of class i_labelled are used for indexation, value labels are always used over the underlying values of the i_labelled data.

Example 1: Indexation of unterlying data

myData <- i_labelled(
  x = c(1, 2, 3, NA), 
  labels = c("A" = 1, "B" = 2, "C" = 3), 
  label = "my Variable"
)

myData %in% 1
myData == 1
myData > 1

Example 2: Indexation of value labels

Keep in mind, if character values are used for indexation, value labels are alway chosen over underlying values.

myData %in% c("A", "B")
myData != "C"
myData > "A"

ilabelled documentation built on April 3, 2025, 10:38 p.m.