NEWS

---

marimekko 0.1.0 (2026-03-16)

• Initial CRAN release.

New features

• geom_marimekko() — formula-based mosaic/marimekko plots as a ggplot2 layer. One-sided formulas (~ a | b) encode both variable hierarchy and split direction. | alternates between horizontal and vertical splits; + groups variables in the same direction.
• geom_marimekko_text() and geom_marimekko_label() — place text or label annotations at tile centres, with access to computed variables via after_stat().
• fortify_marimekko() — extract tile rectangles as a data frame without plotting.
• theme_marimekko() — a minimal theme designed for mosaic plots.
• marimekko_pal — a categorical colour palette.

Computed variables

• .proportion — conditional proportion within the parent tile.
• .marginal — joint proportion relative to the whole dataset.
• .residuals — Pearson residuals measuring departure from independence.

Other

• show_percentages = TRUE appends marginal percentages to x-axis labels.
• Independent gap control via gap_x and gap_y.
• Formulas support arbitrary R expressions (e.g., ~ factor(cyl) | cut(mpg, 3)).
• Compatible with facet_wrap(), facet_grid(), and plotly::ggplotly().