Changes in version 0.2.0                        

Major changes

  - Refactored the monolithic compare_curves() workflow into a modular
    functional analysis API.
  - compare_curves() is now a soft-deprecated wrapper around the new
    modular functions.

New functions

  - functional_pca(): Performs functional principal component analysis
    on fitted disease progress curves to decompose variation among
    epidemic trajectories into orthogonal temporal components. Includes
    plotting and extractor functions.
  - functional_curves(): Fits genotype-specific epidemic trajectories
    using GAM, with support for genotype-level covariates.
  - functional_distances(): Computes pairwise functional distances among
    fitted curves and performs hierarchical clustering and permutation
    testing.
  - functional_resistance(): Calculates Functional Resistance Index
    (FRI) and Stability-Adjusted Functional Resistance Index (SAFRI)
    with support for stratified rankings and bootstrap-supported
    classification.
  - suggest_k(): Helper function to recommend GAM smoothing parameters
    (k_smooth, k_trt, k_env, gamma) based on data structure; supports
    tidy-eval column names and can infer replication from a data frame.

Enhancements

  - Added support for genotype-level auxiliary covariates (e.g.,
    heading_group) to adjust functional curves and resistance rankings,
    allowing for better distinction between genetic resistance and
    phenological escape.
  - Improved bootstrap methodology for resistance classification with
    support for stratified group comparisons.
  - Updated diagnose_curves(), plot_curves(), and plot_dendrogram() to
    support the new functional analysis object classes.

                        Changes in version 0.1.2                        

New functions

  - Added functional_instability() for computing normalized functional
    instability (NFI) of genotype-by-environment epidemic curves, with
    optional decomposition into spatial and temporal components.
  - Added plot_functional_instability() for visualizing overall,
    spatial, and temporal NFI results as bar charts.

                        Changes in version 0.1.1                        

Enhancements

  - Added get_era5() for retrieving ERA5 reanalysis weather data via
    Open-Meteo API.
  - Added get_brdwgd() for extracting daily weather data from the
    Brazilian Daily Weather Gridded Data (BR-DWGD) NetCDF files.
  - Added compare_curves() for functional comparison and clustering of
    epidemic curves.
  - Added plotting and diagnostic helpers for curve models.

                 Changes in version 0.1.0 (2025-07-02)                  

First release

  - Initial release of the r4pde package.