Changes in version 0.2.0 (2026-03-07)                  

New Features

  - Added violin plot support for 'ggplot2' (geom_violin()), including
    both vertical and horizontal orientations.
  - Violin plots produce two interactive layers: a box-summary layer
    (violin_box) with min, Q1, median, Q3, max highlights, and a KDE
    density-curve layer (violin_kde) with navigable density points.
  - Added Ramer-Douglas-Peucker (RDP) curve simplification to reduce KDE
    density points to ~30 per violin while preserving shape fidelity.
  - SVG coordinate injection for violin KDE points enables accurate
    highlight positioning in the maidr frontend.

Enhancements

  - Renamed option maidr.enabled to maidr.auto_show for clarity.
  - Added domMapping.iqrDirection support for violin box layers,
    aligning with the existing box plot pattern for correct Q1/Q3
    highlighting under gridSVG Y-flip transforms.
  - Added plot augmentation API (augment_plot(), needs_augmentation())
    to the LayerProcessor base class, enabling processors to inject
    additional geom layers before rendering.
  - Added multi-layer expansion in the orchestrator for plot types that
    produce more than one maidr layer from a single geom.

Documentation

  - Added violin plot examples to show(), save_html(), vignettes, and
    example scripts.
  - Updated DESCRIPTION to list violin plots as a supported type.

                        Changes in version 0.1.1                        

Resubmission after CRAN archival. Fixes CRAN policy compliance issues.

Bug Fixes

  - Removed all assign(..., envir = .GlobalEnv) calls that violated CRAN
    policy. Base R function wrappers are now installed into the package
    namespace during .onLoad and controlled via an active/inactive flag,
    eliminating any modification of the user's global environment.
  - Removed attach() usage that produced R CMD check NOTE.
  - Fixed Rd documentation warning caused by unicode escape sequences in
    prefix_to_currency_code parameter documentation.

Enhancements

  - Added subtitle and caption support to the MAIDR payload for both
    'ggplot2' and Base R plots.
  - Added scales formatting support for Base R axis labels (currency,
    percent, comma, scientific notation).

                        Changes in version 0.1.0                        

Initial CRAN release.

Features

  - show() - Display interactive, accessible visualizations from ggplot2
    or Base R plots with keyboard navigation and screen reader support
  - save_html() - Export accessible visualizations to standalone HTML
    files
  - render_maidr() and maidr_output() - Shiny integration for
    interactive web applications

Supported Plot Types

ggplot2 - Basic

  - Bar charts (geom_bar(), geom_col())
  - Grouped/dodged bar charts (position = "dodge")
  - Stacked bar charts (position = "stack")
  - Histograms (geom_histogram())
  - Line plots (geom_line())
  - Scatter plots (geom_point())
  - Box plots (geom_boxplot())
  - Heatmaps (geom_tile())
  - Smooth/density curves (geom_smooth(), geom_density())

ggplot2 - Advanced

  - Faceted plots (facet_wrap(), facet_grid())
  - Multi-panel layouts with patchwork package
  - Multi-layered plots (e.g., histogram + density, scatter + smooth)

Base R - Basic

  - Bar plots (barplot())
  - Grouped bar plots (beside = TRUE)
  - Stacked bar plots (beside = FALSE)
  - Histograms (hist())
  - Line plots (plot() with type = "l", lines())
  - Scatter plots (plot())
  - Box plots (boxplot())
  - Heatmaps (image())
  - Density curves (lines(density()))

Base R - Advanced

  - Multi-panel plots (par(mfrow), par(mfcol))
  - Faceted-style plots (using par() with loops)
  - Multi-layered plots (sequential plotting calls)

Accessibility Features

  - Keyboard navigation for data exploration
  - Screen reader compatibility with ARIA labels
  - Sonification (audio representation of data)
  - Multiple sensory modalities for data access