Changes in version 0.2.2 (2026-05-04)                  

Bug Fixes

  - Fixed create_design() crash for any analysis including 1999 or 2001
    NHANES cycles. The needs_2yr flag was referenced but never defined,
    causing object 'needs_2yr' not found at runtime.
  - Fixed create_design() requiring 2-year weight columns (wtint2yr,
    wtmec2yr) for datasets containing only 1999/2001 cycles, where those
    columns do not exist in NHANES demographic files.
  - Fixed fasting weight validation to check for wtsaf4yr when 1999/2001
    cycles are present, matching the calculation logic that already used
    it.
  - Added wtsaf4yr to globalVariables() to resolve R CMD check NOTEs.
  - Corrected roxygen documentation that incorrectly stated 4-year
    fasting weights were not supported.

                 Changes in version 0.2.1 (2026-02-28)                  

Bug Fixes

  - Converted vignettes from Quarto (.qmd) to R Markdown (.Rmd) to fix
    vignette build failures on Windows CI.

New Features

  - Adding create_design() function to return survey-weighted design
    data for use in downstream analyses. Combines cycles and properly
    accounts for weight type (interview, MEC, fasting) and adheres to
    CDC guidelines for use with earlier cycles. See CDC Weighting
    Guidelines for more information.

                        Changes in version 0.2.0                        

Released: Feb. 2026

Breaking Changes

  - Categorical columns across all datasets are now stored as character
    with human-readable labels instead of raw numeric codes. For
    example, BMX bmdbmic values like 2, 3, 4, 1 are now "Normal weight",
    "Overweight", "Obese", "Underweight". This affects 95 variables
    across 22 datasets.

Bug Fixes

  - Fixed data corruption where factor-to-numeric conversion returned
    internal level indices instead of actual CDC codes (e.g., codes
    1, 3, 4 were silently stored as 1, 2, 3).
  - Fixed continuous variables like ridageyr and indfmpir being
    corrupted when categorical label mappings were incorrectly applied
    to them.
  - Fixed column type clashes when binding survey cycles where a column
    existed in some cycles but not others.

New Features

  - Cross-cycle label translation: when the CDC codebook is unavailable
    for a particular cycle, labels are now carried over from a sibling
    cycle so all waves have consistent human-readable values.
  - Added 5 new datasets: dxxag, l10, l10am, lab10, lab10am (71 datasets
    total).
  - Added inst/CITATION for citation("nhanesdata") support.

Contributors

  - Added Amrit Baral, Natalie Neugaard, Johannes Thrul, and Janardan
    Devkota as contributors.

                        Changes in version 0.1.1                        

Released: Jan. 2026

Changes

  - Automated annual data updates via GitHub Actions with checksum-based
    change detection and Cloudflare R2 uploads.
  - Replaced pins with direct R2 uploads for simpler URL structure.
  - Added dataset catalog vignette with searchable table.

                        Changes in version 0.1.0                        

Breaking Changes

  - read_r2() renamed to read_nhanes().
  - pull_nhanes() no longer exported; use read_nhanes() to load data.

Improvements

  - Reduced required dependencies (moved 7 packages to Suggests).
  - Dataset names are now case-insensitive.
  - Improved error messages and get_url() reliability.

Bug Fixes

  - Fixed pull_nhanes() where save() failed with "object not found"
    error.
  - Fixed NULL handling in term_search() and var_search().
  - Fixed Begin.Year column not converting to numeric.

                     Changes in version 0.0.0.9000                      

  - Initial development version with core functionality for accessing
    and managing NHANES data.