Support computing statistics for haven_labelled data types in data explorer for R

[wesm]

As noted in #5230, we don't show any summary sparklines for haven_labelled type columns loaded from read_sav, for example.

[testlabauto]

Verified Fixed

Positron Version(s) : 2025.01.0-2
OS Version          : OSX

Test scenario(s)

library(haven)
library(labelled)

# Create a haven-labeled dataframe
df <- data.frame(
  id = 1:5,
  gender = c(1, 2, 1, 2, 1),
  age = c(25, 30, 35, 40, 45),
  income = c(50000, 60000, 55000, 65000, 70000)
)

# Assign labels to individual variables
df$gender <- labelled(
  df$gender,
  labels = c("Male" = 1, "Female" = 2)
)
df$income <- labelled(
  df$income,
  labels = c(
    "Low Income" = 50000,
    "Medium Income" = 60000,
    "High Income" = 70000
  )
)

# Add variable-level labels
df <- set_variable_labels(
  df,
  gender = "Gender of the respondent",
  age = "Age in years",
  income = "Income level in USD"
)

Link(s) to TestRail test cases run or created: