Mickaël CANOUIL, Ph.D.

@mickael

Quarto Extension Creator & R Package Developer | Biostatistics, Ph.D.

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Mickaël CANOUIL, Ph.D.@mickael· 5d

Three years ago I started shell completions for the Quarto CLI and abandoned them mid-way. Finished them this month, so I can finally stop running '--help' to guess a command/flag name. Happier in the terminal than I was on Monday. m.canouil.dev/quarto-completions #Quarto #OpenSource #QuartoPub

Mickaël CANOUIL, Ph.D.@mickael· 11d

Stop wasting time trying to find manually Quarto extensions, install them from registry, GitHub (public and private), local path, check for updates, etc. Use Quarto Wizard for Positron and VSCode now! Check out the documentation: m.canouil.dev/quarto-wizard/ #Quarto #VSCode #Positron

Mickaël CANOUIL, Ph.D.@mickael· 12d

This week's TidyTuesday is a set of biodiversity occurrence records. I picked four organisms and gave each its own radial dial look, one wedge per month. Drawn in Typst with Gribouille: geom-col under coord-radial, split with facet-wrap. #TidyTuesday #DataViz #Typst

Four radial dials in a row, one per species, each showing that species' year. Months run clockwise from January at the top, so the southern winter sits at the bottom, and every wedge is that month's share of the species' own records. Each dial is labelled with its species and its peak: orchid at 43 percent in September, glowworm at 30 percent in December, manta ray at 29 percent in July, and Gouldian finch at 16 percent in July. The orchid dial is dominated by one deep rose wedge reaching past the fourth ring on the left of the circle, with August and October beside it and almost nothing from December to April. The glowworm dial in green leans to the upper left, into the southern summer of November and December. The manta ray dial in ocean blue points straight down into June, July and August. The Gouldian finch dial in ochre is the most even, a small fan spread across the dry season from April to September and never rising far. Rings mark 10, 20, 30 and 40 percent.

Mickaël CANOUIL, Ph.D.@mickael· 15d

TidyTuesday (21st of July 2026) is an archive of near-death experience accounts, each scored on the Greyson NDE Scale. The figure is a geom-beeswarm of every scored account under coord-flip, each theme carrying its own median as a rule. Made in Typst with Gribouille. #TidyTuesday #DataViz #Typst

A horizontal beeswarm chart with eight rows, one for each theme the near-death experience archive codes for, ordered from the commonest at the top to the rarest at the bottom: ai_clinical with 526 accounts, ai_obe with 336, ai_unity with 96, ai_esp with 90, ai_hellish with 46, ai_world_future with 27, ai_past_lives with 20, and ai_aliens with 5. Each row label gives the column name in a monospaced face, then a plain-English gloss, the number of accounts and how many reach 7. The horizontal axis is the Greyson NDE Scale score, running the full length of the scale from 0 to 32. One dot marks each account, swarmed vertically within its row. In every row the dots pile into narrow columns between 0 and 4 and then thin out fast, so the right two-thirds of the panel is almost empty. A short dark rule marks each row's median; all eight sit between 2 and 3. A dashed crimson line just below 7 marks the threshold at which the scale counts an account as a near-death experience, and the few dots beyond it are drawn in crimson at full strength while the rest are held back in warm grey. A callout in the empty right-hand space states that 53 of 587 scored accounts, 9 percent, reach 7, that the scale runs to 32, and that the whole archive stops at 27.

Mickaël CANOUIL, Ph.D.@mickael· 16d

Screenshot of the Quarto Codespaces documentation homepage in dark mode.
The top navigation bar holds links for Getting started, Reference, and Contributing, plus a GitHub badge showing 39 stars and 23 forks, a theme toggle, and a search icon.
The page title "Quarto Codespaces" sits above the tagline "GitHub Codespaces and Dev Containers with Quarto, R, Python, and Julia, ready to render".
Below it, a panel labelled "Ready to render" describes a full Quarto toolchain including the Quarto CLI, R with renv, Python with uv and Jupyter, Julia with IJulia, TinyTeX for PDF, and headless Chromium for screenshots and Decktape.
Two cards each offer an "Open in GitHub Codespaces" button: "Purpose-built image", described as everything preinstalled and fastest to start, and "Universal base image", described as lighter on your GitHub storage quota.

Mickaël CANOUIL, Ph.D.@mickael· 18d

For the 14th of July TidyTuesday, the Many Penguins dataset: The three penguin species everyone plots turn out to fill one small corner of the family. Made in Typst with Gribouille: geom-point over a geom-mark hull that traces the whole family. #TidyTuesday #DataViz #Typst

A scatter plot of beak length along the culmen against beak depth for 92 penguin specimens covering 18 species in 6 genera. A pale grey envelope traces the outline of the whole family, and 75 small grey points inside it are the 15 species outside palmerpenguins. The 17 specimens of the palmerpenguins three are drawn larger, each species with its own colour and its own shape: coral circles for Adélie, teal triangles for chinstrap, and blue squares for gentoo. All three cluster tightly between about 53 and 69 millimetres of beak length and 15 to 22 millimetres of depth, and a dashed brown rectangle encloses exactly that range. The rectangle covers a small part of the panel: the family as a whole spans 43.5 to 110 millimetres in length and 11.9 to 31 millimetres in depth. A key inside the empty band below the rectangle names the three species with their marks and sample sizes. Three specimens at the edges of the family are labelled by name: E. minor at 43.5 millimetres long in the bottom left, E. schlegeli at 31 millimetres deep at the top, and A. patagonicus at 110 millimetres long on the far right. A callout in the upper right states that the dashed box covers 24 percent of the family's range in length and 34 percent of it in depth, roughly 8 percent of the area the other fifteen species fill.

Mickaël CANOUIL, Ph.D.@mickael· 18d

One Quarto source, three renders. 'offset-headings', 'prism', and 'cascade' fix heading levels, format-only attributes, and slide breaks, so HTML, a Typst PDF, and a reveal.js deck come from the same file. Find out how: mickael.canouil.fr/posts/2026-0... #quartoPub #typst #revealjs #html

Mickaël CANOUIL, Ph.D.@mickael· 18d

gitlink 1.8.0 turns a Quarto navbar placeholder into a live repository widget: star and fork counts from the platform API, cached four hours, plus a menu of project links you can extend. (inspired by great-docs from @richmeister.bsky.social) github.com/mcanouil/quarto-gitlink #quartoPub #opensource

Mickaël CANOUIL, Ph.D.@mickael· 26d

Gribouille 0.5.0: native kernel density estimation in pure Typst. Densities, violins, ridgelines, LOESS, streamgraphs, bump and waffle charts. Yes, a lot of amazing stuff 😎 mickael.canouil.fr/posts/2026-07-13-gribouille-0-5/ #typst #dataviz #gribouille

Mickaël CANOUIL, Ph.D.@mickael· 29d

Streamgraph with pattern filling! 😎 Gribouille 0.5.0 release in progress ... #Typst #DataViz #GrammarOfGraphics

A four-series streamgraph, each band flowing left to right and centred on a common baseline so the stack swells and narrows over time, every band filled with its own Typst tiling pattern (stripes, dots, cross-hatch, and horizontal lines).

Mickaël CANOUIL, Ph.D.@mickael· Jul 12

For this week TidyTuesday a simple figure displaying the percentages of knockouts per gender. (not much inspired🤷‍♂️) Obvious (at least to those who fights), the heavier the fighter is, the harder their punch hit, thus why different weight categories 😅 #TidyTuesday #Typst #Gribouille

A horizontal stacked bar chart of 8,258 UFC fights across twelve weight divisions, split into a men's group of eight bars on top and a women's group of four below, each ordered lightest to heaviest and labelled with its gender and weight limit. Every bar runs from 0 to 100 percent and is split into three segments: a vermillion knockout share anchored at the left, a blue submission share in the middle, and a quiet warm-grey decision share on the right. The vermillion knockout wedge widens with the weight limit in both groups, from 23 percent among men's flyweights to 52 percent among men's heavyweights, and from 13 percent among women's strawweights to 24 percent among women's featherweights. Men's heavyweight is the only bar to cross a dashed line at the halfway mark. The decision share falls the same way in each group while the blue submission share stays near one in five throughout. A vermillion ring traces the men's heavyweight knockout wedge, with a callout noting that over half of men's heavyweight bouts end in a knockout.

Mickaël CANOUIL, Ph.D.@mickael· Jul 12

The next version of Gribouilles comes with few API breaking changes for the better (validation especially). It also comes with new position/stats helpers to make: steamgraph, waffle, bump chart, and difference area chart. #Typst #Gribouille #GrammarOfGraphics #ggplot2

Streamgraph of three coloured bands on a wiggle-minimising baseline, flowing organically around the zero line over x = 0 to 11.

Band between a rising forecast series and a wavering actuals series, filled by 'above forecast' and 'below forecast' legend entries, with both series drawn as lines over the band.

Waffle chart of 77 unit squares in a 7-row grid, coloured by status: 43 complete, 22 active, 12 queued, reading column by column from the left.

Bump chart of three teams' ranks over five rounds; smooth S-shaped connectors ease each team between rank positions, with rank 1 at the top.

Mickaël CANOUIL, Ph.D.@mickael· Jul 10

Quarto builds social cards for every page but leaves Reveal.js decks out. No more. Revealjs Social 1.0.0 reads the social metadata you write and injects them into the deck's head, so links unfurl. github.com/mcanouil/quarto-revealjs-social #Quarto #RevealJS #OpenSource #DataScience #QuartoPub

Single dark square announcing the Quarto extension quarto-revealjs-social 1.0.0, styled as a chat feed. Kicker reads "Quarto extension, v1.0.0". Headline: "Your Reveal.js slides also deserve a social card", with "social card" in link blue. Below it: Quarto cards HTML documents and websites, but not Reveal.js decks; this filter injects the Open Graph and Twitter tags so links unfurl. An install panel labelled "Install, then add the filter" shows two commands: quarto add mcanouil/quarto-revealjs-social@1.0.0, then filters: social in the deck's front matter. At the bottom, links to GitHub at github.com/mcanouil/quarto-revealjs-social and the demo at m.canouil.dev/quarto-revealjs-social/.

Mickaël CANOUIL, Ph.D.@mickael· Jul 10

More accessibility tools for your figures coming in Gribouille for Typst. Add filling patterns in addition to colours. Documentation: m.canouil.dev/gribouille/dev #Typst #grammarOfGraphics #accessibility

Histogram showing 3 bars for two levels on x-axis, where each of the bars display a filling colour and a pattern, also displayed in the legend swatches.

Mickaël CANOUIL, Ph.D.@mickael· Jul 9

Densities and violin plots are coming to Gribouille🎉 #Typst #GrammarOfGraphics #dataViz

Figure showing two groups on the x-axis (a and b) divided in two by fill colour (u in yellow, and v in blue), with a y-axis ranging from zero to ten by a step of two.
For x/fill groups there are four violion plots

Mickaël CANOUIL, Ph.D.@mickael· Jul 3

Let's dive into ships wrecks for this week TidyTuesday with Gribouille for Typst. #Typst #Gribouille #TidyTuesday

A diverging bar chart styled as an underwater cross-section of Irish shipwrecks by decade from 1750 to 2010. A pale surface at the top deepens through blue into the dark deep at the bottom. A waterline at zero splits each decade into wrecks that have been located, rising above it in bright teal, and wrecks with no recorded position, sinking below it in steel blue. Before 1840 almost every column plunges into the deep, peaking in the 1850s with 1,382 lost, 96 percent never located. From the 1910s the found share climbs sharply: the vermillion-outlined World War One column is the turning point, with about half of that decade's wrecks found (630). After 1950 the small columns sit almost entirely above the waterline, nearly every wreck charted. A small sinking-ship motif rests in the deep bottom-right corner.

Mickaël CANOUIL, Ph.D.@mickael· Jul 2

Reveal.js Comic: a new Quarto format that styles your slides as a super-hero comic book. github.com/mcanouil/quarto-revealjs-comic #Quarto #RevealJS #Slidecrafting #QuartoPub

Mickaël CANOUIL, Ph.D.@mickael· Jul 1

My day job is to conduct statistical analysis of omics data, and most of it is spent writing R. In this new blog post, I share the R package shape I reached for in my recent projects. mickael.canouil.fr/posts/2026-0... #RStats #Shiny #Quarto #OpenSource #DataScience

Mickaël CANOUIL, Ph.D.@mickael· Jun 27

A bit late, but here is the figure made with Gribouille in Typst for TidyTuesday. m.canouil.dev/tidytuesday/... #Typst #Gribouille #TidyTuesday

A horizontal lollipop chart ranking eleven modern popes by the number of encyclicals they published, ordered from Leo XIII at the top down to Leo XIV, each pope labelled with their reign years and the count at the end of its stem. Leo XIII leads with 86 in a warm accent colour, more than double the next, Pius XII with 39. The remaining popes are in muted grey: Pius XI 23, Pius X 16, John Paul II 14, Benedict XV 12, John XXIII 8, Paul VI 7, Francis 4, Benedict XVI 3, and Leo XIV with 1. A translucent funnel links the Leo XIII point to an inset column chart in the bottom-right showing his encyclicals per year across his 25-year reign, holding roughly steady between two and eight.

Mickaël CANOUIL, Ph.D.@mickael· Jun 26

I'll be presenting Gribouille (Grammar-of-graphics for Typst) next Tuesday (the 30th of June at 5.30pm CEST) at the #ggplot2 extenders meetup. @teunbrand.bsky.social will be also presenting ggsql (Grammar-of-graphics for SQL), so you have two good reasons to join! bit.ly/join-gg-exte...

No alternative text description for this imageComic book style title slide with a red, yellow, and pink sunburst background. Bold yellow text outlined in black reads "The Grammar of Graphics Assembles". Below it, a blue ribbon banner reads "R, Python, SQL... and now" next to a red starburst badge containing the word "Typst" in yellow. Underneath, a white box reads "Mickaël Canouil, Ph.D." and a smaller white box below it reads "2026-06-30".

Mickaël CANOUIL, Ph.D.@mickael· Jun 25

The main issue is that it makes the layout very rigid while Typst is actually really flexible.

Command reference card for Saga, a black Labrador Retriever (male, born 6 September 2021), shown in a circular photo at top. Dark background with orange accents. Sections list French dog commands: feeding info (allowed to eat "à table", 2 glasses morning and evening, weight 39.8 kg, not sterilised); basic obedience (assis/sit, coucher/down, debout/stand, reste/stay, stop, vas-y/go, au lit/go to bed); tricks (bonjour/give paw, touche/nose touch, pan/play dead, rampe/crawl); recall and position (viens/come, au pied/heel, droite, gauche, milieu); movement, stairs and street (monte, descend, trottoir, traverse/cross the road); objects and retrieval (vas chercher/fetch, cherche/search, lâche/drop, laisse/leave it, prends/take).

Mickaël CANOUIL, Ph.D.@mickael· Jun 23

Quarto Iconify 4.0.0 renders icons in Typst output. The same shortcode you write for HTML now lands in your PDF. Each SVG is fetched from the Iconify API, cached on disk, and emitted as a Typst image. github.com/mcanouil/quarto-iconify #quarto #typst #rstats #python #quartoPub

Mickaël CANOUIL, Ph.D.@mickael· Jun 22

Something big is coming!! Did you ever wish you could access any of the icons from Iconify (200k+) in your PDF and not only in your website or slides made with Quarto? Guess what, Iconify is coming to your Typst PDFs in Quarto. Get the Quarto logo everywhere! #Quarto #QuartoPub #Typst

Mickaël CANOUIL, Ph.D.@mickael· Jun 21

Every line, star, and gradient in this chart was drawn in Typst, with Gribouille plotting its own star history. Achieve publication-quality graphics with a single toolchain, no external plotting tools needed. Gribouille 0.4.0 soon. Full source ships with the announcement. #Typst #DataViz

Midnight-sky line chart of Gribouille's cumulative GitHub stars per day from April to June 2026, titled "Gribouille, a Rising Star". A luminous gold step trail rises from zero across a long flat run labelled "Quietly built in private", lifts at a gold dashed marker labelled "Made public 17th of May", then climbs through dashed release markers (v0.1.0 onward) to a final amber spike of 178 stars, annotated "+99 in a day". The y axis counts stars in steps of 25; the x axis spans months.

Mickaël CANOUIL, Ph.D.@mickael· Jun 19

I built a Quarto Reveal.js theme that turns slides into a comic book. Speech bubbles, KAPOW and KABOOM bursts, halftone panels, themed tables. Do you want it? 😏 #quarto #revealjs #slidecrafting

Mickaël CANOUIL, Ph.D.@mickael· Jun 18

When tips and tricks from Cara Thompson, for better visualisation leads to making improvements to Gribouille in #Typst. Check out the talk materials, given yesterday at #RencontresR 2026. www.cararthompson.com/talks/rencon...

Line chart. Season (1 to 10) on the x-axis, number of creations on the y-axis (0 to 30). Three series marked by icons: chocolate, raspberry, and orange. Chocolate swings sharply between 19 and 30 creations across seasons 1 to 7 (the "Mary Berry years"), then drops to 12 to 15. Raspberry and orange stay low, between 4 and 13, tracking each other closely. Chocolate leads in every season except season 8, where orange briefly overtakes it.

Mickaël CANOUIL, Ph.D.@mickael· Jun 17

Quarto Typst Render 0.18.0 ships 'format: html'. '{typst}' blocks and inline maths render as native HTML via Typst 0.15: selectable prose, accessible MathML, not a flat image. Write equations in Typst syntax with 'math: typst'. github.com/mcanouil/quarto-typst-render #quarto #typst #a11y

Mickaël CANOUIL, Ph.D.@mickael· Jun 15

Reproduction with #Typst -> Done (still some work to do on Gribouille obviously) 😎

Screenshot of VSCode showing a Typst document on the left with Gribouille code to draw penguins bill depth against bill length coloured by body mass, with a line cutting between to clouds of points. The figure itself is displayed on the right side

Mickaël CANOUIL, Ph.D.@mickael· Jun 15

For this week #TidyTuesday using Gribouille (grammer-of-graphics for Typst), a simple entry with an area charts with labels, showing the counts of neutral gender baby names in the UK. #Typst #Quarto #QuartoPub #Gribouille

An area chart with a teal shaded region showing the share of baby names registered for both boys and girls across all three UK nations combined from 1997 to 2024. The shaded area fluctuates between about 3.5 percent and 5 percent across the period. Six text labels appear above the line at five-year intervals marking the most-registered gender-neutral name in each window: Jordan near 1998, Cameron near 2002, Charlie near 2007 and 2012, Noah near 2017 and 2022. The y-axis labels pair the percentage with an approximate count of names in parentheses.

Mickaël CANOUIL, Ph.D.@mickael· Jun 9

This week #TidyTuesday in Typst using Gribouille (Grammar of graphics). m.canouil.dev/tidytuesday/... #Typst #Gribouille #grammarofGraphics #dataViz