Changes in version 1.0.3 (2026-02-08)                  

Bug Fixes

  - Fixed Unicode escape sequences (\u03C4, \u03B8, \u03C1) in R source
    files that were causing LaTeX errors during PDF manual generation on
    CRAN
  - These escapes were converted to actual Greek characters when
    roxygen2 generated the .Rd files, which LaTeX could not process
  - Replaced with ASCII text equivalents (tau, theta, r)

                        Changes in version 1.0.2                        

Bug Fixes

  - Removed all Unicode characters from package files to fix LaTeX PDF
    generation
  - Version 1.0.1 still had Greek characters in cran-comments.md and
    NEWS.md

                        Changes in version 1.0.1                        

Bug Fixes

  - Fixed Unicode Greek characters (theta, tau) in vignette and README
    that caused LaTeX errors during PDF manual generation
  - Replaced Unicode superscript characters with ASCII equivalents

                        Changes in version 1.0.0                        

Initial Release

  - First public release of the QuantileOnQuantile package
  - Implements the Quantile-on-Quantile regression methodology from Sim
    and Zhou (2015)

New Features

  - qq_regression() - Main function for performing QQ regression
    analysis
    
      - Supports customizable quantile grids
      - Multiple standard error estimation methods
      - Verbose progress reporting option

  - plot_qq_3d() - Interactive 3D surface plots with plotly
    
      - MATLAB-style Jet colorscale (default)
      - Blue-Red diverging colorscale
      - Viridis and Plasma perceptually uniform scales
      - Customizable gridlines and camera angles

  - plot_qq_heatmap() - 2D heatmap visualization
    
      - Automatic colorscale selection based on variable type
      - Customizable axis labels and titles

  - plot_qq_contour() - Contour plots with labeled level curves

  - plot_qq_correlation() - Quantile correlation heatmaps
    
      - Python seaborn-style blue-red diverging scale
      - Automatic annotations

  - qq_statistics() - Summary statistics for QQ results

  - qq_to_matrix() - Convert results to matrix format

  - qq_export() - Export results to CSV

  - qq_colorscales() - Display available color scales

Documentation

  - Comprehensive vignette with examples based on oil-stock relationship
  - Full roxygen2 documentation for all functions
  - CRAN-compliant package structure

References

  - Sim, N. and Zhou, H. (2015). Oil Prices, US Stock Return, and the
    Dependence Between Their Quantiles. Journal of Banking & Finance,
    55, 1-12. doi:10.1016/j.jbankfin.2015.01.013