mariposa (version 0.7.3)

read_xlsx: Read Excel Data with Label Reconstruction

Description

Reads an Excel (.xlsx) file and returns a tibble. When the file was created by write_xlsx(), the accompanying "Labels" sheet is automatically detected and used to reconstruct variable labels, value labels, and tagged NA metadata -- giving you the same labelled structure as the original data.

For plain Excel files (without a "Labels" sheet), this function works like a convenient wrapper around the openxlsx2 reader, returning a clean tibble.

Usage

read_xlsx(path, sheet = NULL, labels = TRUE, verbose = FALSE, ...)

Value

A tibble. When a mariposa-formatted Labels sheet is detected:

• Numeric columns with value labels are returned as haven_labelled vectors

• Factor columns are reconstructed with their original levels

• Variable labels are attached via attr(x, "label")

• Tagged NAs are restored with na_tag_map and na_tag_format attributes

Arguments

path

Path to the .xlsx file.

sheet

Sheet to read. NULL (default) auto-detects: reads the "Data" sheet if present, otherwise the first non-metadata sheet. Can be a sheet name (character) or index (integer).

labels

If TRUE (default), detects a "Labels" sheet and reconstructs haven_labelled columns, factor levels, variable labels, and tagged NA metadata. Set to FALSE to read raw data without label reconstruction.

verbose

If TRUE, prints a summary of reconstructed labels and tagged NA mappings.

...

Additional arguments (currently unused).

Details

Roundtrip Workflow

read_xlsx() is designed to work seamlessly with write_xlsx():

write_xlsx(data, "survey.xlsx")   # Exports data + Labels sheet
data2 <- read_xlsx("survey.xlsx") # Reconstructs labels from Labels sheet

The reconstructed data will have the same variable labels, value labels, and tagged NA codes as the original. System NAs (empty cells in Excel) remain as regular NA.

File Format Detection

read_xlsx() auto-detects the type of mariposa export:

• data.frame export ("Data" + "Labels" sheets): Reads the "Data" sheet and applies labels.

• list export (multiple data sheets + "Labels" with "Sheet" column): Reads the specified or first data sheet and applies matching labels.

• codebook export ("Overview" + "Codebook" sheets): Warns that this is a documentation file and reads it as a plain table.

• plain Excel: No Labels sheet detected; returns raw data.

When to Use This

Use read_xlsx() when you:

• Want to read back data exported with write_xlsx()

• Need a quick way to import any .xlsx file as a tibble

• Want to share labelled survey data via Excel and read it back with all metadata intact

See Also

write_xlsx() for exporting data with labels, read_spss(), read_stata(), read_sas() for importing from statistical software

Other data-import: na_frequencies(), read_por(), read_sas(), read_spss(), read_stata(), read_xpt(), strip_tags(), untag_na()

Examples

# \donttest{
if (requireNamespace("openxlsx2", quietly = TRUE)) {
  # Roundtrip: export with labels, read back with reconstruction
  tmp <- tempfile(fileext = ".xlsx")
  write_xlsx(survey_data, tmp)

  data <- read_xlsx(tmp)
  attr(data$gender, "labels")   # Value labels restored
  attr(data$gender, "label")    # Variable label restored

  # Skip label reconstruction
  raw <- read_xlsx(tmp, labels = FALSE)

  unlink(tmp)
}
# }