Gribouille

Authoring gribouille plots

Gribouille is a grammar-of-graphics plotting library for Typst; the API mirrors ggplot2 (R) and plotnine (Python). A plot layers geom-* over shared data and an aesthetic mapping.

Import

#import "@preview/gribouille:0.5.0": *

Pin the version to the installed one; check it via llms.txt or Typst Universe.

Mental model

Pipeline, forward only:

data → stat → position → scale → coord → facet → theme → render

• data: a dictionary of column arrays, or a built-in dataset (penguins, mpg, economics).
• mapping: aes(...): column names to aesthetics (x, y, colour, fill, shape, size, alpha, linetype, label, …); unknown channels (including the US spelling color) are rejected.
• layers: a tuple of geom-*; each geom may set its own stat, position, mapping, and key (legend glyph); stat-backed geoms take stat: auto to build their default stat from the geom parameters.
• scales: how values map to axes and palettes; see the scales section below.
• coord, facet, labels, guides, theme: everything else.
• Late binding: after-stat(...), after-scale(...), from-theme(...), stage(...).

Call shape

#plot(
  data: <dict-of-columns or dataset>,
  mapping: aes(x: "...", y: "...", colour: "...", ...),
  layers: (
    geom-point(...),
    geom-smooth(method: "lm", se: true),
    // more layers ...
  ),
  scales: scales(
    x: scale-continuous(),
    colour: scale-discrete(...),
    // more scales ...
  ),
  coord: coord-cartesian(),    // optional
  facet: facet-wrap("group"),  // optional
  labels: labels(title: "...", x: "...", y: "..."),
  guides: guides(...),         // optional; guides(default: none) hides all legends
  theme: theme-minimal(),
  alt: "...",                  // optional accessibility text
  width: 12cm,                 // default 10cm
  height: 9cm,                 // default 7cm
)

as-spec: true returns the raw spec instead of rendering, for compose() composition.

Scales

Scale constructors are aesthetic-agnostic; the aesthetic comes from the scales() key:

• scales(colour: scale-viridis-d()), not scale-colour-viridis-d().
• scales(x: scale-log10()), not scale-x-log10().

plot(scales:) accepts only the scales() dictionary; there is no positional array. The same constructor adapts to its key (axis for x/y, palette for colour/fill, output range for size/alpha/…). Unknown constructor arguments, unknown aesthetics, and positional arguments fail at binding with the valid keys listed.

Symbol inventory

What exists, by family (regenerate with lua tools/skill-inventory.lua). Arguments, defaults, and types still come from each symbol's .llms.md reference page.

• Core: plot, compose, defer, aes, as-factor, as-numeric, typst, after-scale, after-stat, from-theme, stage.
• Datasets: economics, mpg, penguins.
• Labels: labels.
• Guides: guide-legend, guide-axis, guide-axis-logticks, guide-axis-stack, guide-axis-theta, guide-custom, guides, draw-key-blank, draw-key-line, draw-key-path, draw-key-point, draw-key-rect.
• Geoms: annotate, geom-point, geom-line, geom-path, geom-step, geom-area, geom-rect, geom-tile, geom-bin-2d, geom-hex, geom-contour, geom-contour-filled, geom-segment, geom-curve, geom-spoke, geom-polygon, geom-ellipse, geom-mark, geom-col, geom-bar, geom-histogram, geom-freqpoly, geom-density, geom-density-2d, geom-density-2d-filled, geom-smooth, geom-ribbon, geom-boxplot, geom-violin, geom-density-ridges, geom-errorbar, geom-errorbarh, geom-count, geom-linerange, geom-crossbar, geom-pointrange, geom-hline, geom-vline, geom-abline, geom-text, geom-typst, geom-label, geom-jitter, geom-beeswarm, geom-blank, geom-rug, geom-function, geom-dotplot, geom-quantile, geom-qq, geom-qq-line.
• Stats: stat-identity, stat-count, stat-density, stat-density-2d, stat-density-2d-filled, stat-ydensity, stat-density-ridges, stat-sum, stat-function, stat-bin, stat-bin-2d, stat-bin-hex, stat-contour, stat-contour-filled, stat-bindot, stat-smooth, stat-boxplot, stat-summary, stat-summary-bin, stat-summary-2d, stat-summary-hex, stat-ecdf, stat-unique, stat-qq, stat-qq-line, stat-ellipse, stat-quantile, stat-manual, stat-connect, stat-align, stat-difference, stat-waffle.
• Helpers: get-alt-text, format-comma, format-currency, format-lower, format-number, format-percent, format-scientific, format-title, format-upper, format-wrap, mean, mean-cl-boot, mean-cl-normal, mean-sd, mean-se, median, median-hilow, quantile, quantiles, cut-interval, cut-number, cut-width, resolution, qnorm.
• Wrangle: count, summarise, distinct, drop-na, relocate, rename, select, slice-max, slice-min, pivot-longer, pivot-wider, anti-join, bind-cols, bind-rows, full-join, inner-join, left-join, semi-join.
• Scales: scales, scale-area, scale-binned, scale-binned-area, scale-brewer, scale-continuous, scale-date, scale-datetime, scale-discrete, scale-distiller, scale-fermenter, scale-gradient, scale-gradient2, scale-gradientn, scale-grey, scale-hue, scale-identity, scale-log10, scale-manual, scale-okabe-ito, scale-radius, scale-reverse, scale-sqrt, scale-steps, scale-steps2, scale-stepsn, scale-time, scale-viridis-b, scale-viridis-c, scale-viridis-d, dup-axis, sec-axis, brewer-palette, okabe-ito, colour-mix, expand-limits.
• Coord: coord-cartesian, coord-fixed, coord-flip, coord-radial, coord-transform.
• Positions: position-stack, position-dodge, position-fill, position-identity, position-jitter, position-jitterdodge, position-beeswarm, position-nudge.
• Facets: facet-wrap, facet-grid, label-both, label-context, label-value, label-wrap, labeller.
• Themes: theme-grey, theme-minimal, theme-classic, theme-void, theme-bw, theme-linedraw, theme-light, theme-dark, theme, element-blank, element-geom, element-line, element-rect, element-text, element-typst, margin, theme-sub-axis, theme-sub-axis-bottom, theme-sub-axis-left, theme-sub-axis-right, theme-sub-axis-top, theme-sub-axis-x, theme-sub-axis-y, theme-sub-legend, theme-sub-panel, theme-sub-plot, theme-sub-strip, theme-get, theme-set.

Worked example

#import "@preview/gribouille:0.5.0": *

#let species-colours = (
  Adelie: rgb("#ff8c00"),
  Chinstrap: rgb("#008B8B"),
  Gentoo: rgb("#800080"),
)

#let species-scale = scale-discrete(
  limits: species-colours.keys(),
  palette: species-colours.values(),
)

#plot(
  data: penguins,
  mapping: aes(
    x: "flipper-len",
    y: "body-mass",
    colour: "species",
    fill: "species",
    shape: "species",
  ),
  layers: (
    geom-point(size: 2pt, alpha: 0.25, stroke: 0.5pt, colour: rgb("#ffffff")),
    geom-smooth(method: "lm", se: true, alpha: 0.2),
    geom-mark(method: "hull", expand: 5pt, alpha: 0.25),
  ),
  scales: scales(
    x: scale-continuous(),
    y: scale-continuous(labels: format-comma()),
    colour: species-scale,
    fill: species-scale,
  ),
  labels: labels(
    title: typst("Penguins *Dataset*"),
    x: "Flipper Length (mm)",
    y: "Body Mass (g)",
  ),
  guides: guides(default: none),
  theme: theme-minimal(),
  width: 12cm,
  height: 9cm,
)

Bind a shared scale once (species-scale) and reuse it for every aesthetic that carries the same palette.

Density and pattern fills

Native kernel density estimation; the same KDE core backs geom-violin, geom-density-ridges, geom-density-2d, and geom-density-2d-filled:

#plot(
  data: penguins,
  mapping: aes(x: "body-mass", fill: "species"),
  layers: (geom-density(fill: auto, alpha: 0.4),),
)

Fills accept native Typst tiling paints, as fixed fill: values or through a palette; legend swatches render the pattern:

#let stripes(base, ink) = tiling(size: (5pt, 5pt))[
  #place(box(width: 5pt, height: 5pt, fill: base))
  #place(line(start: (0%, 100%), end: (100%, 0%), stroke: 1pt + ink))
]

#plot(
  data: (g: ("a", "a", "b", "b"), n: (3, 5, 2, 4), k: ("x", "y", "x", "y")),
  mapping: aes(x: "g", y: "n", fill: "k"),
  layers: (geom-col(position: "dodge"),),
  scales: scales(fill: scale-manual(values: (
    stripes(rgb("#fde68a"), rgb("#b45309")),
    stripes(rgb("#bfdbfe"), rgb("#1d4ed8")),
  ))),
)

Gotchas

• Aesthetics use British spelling: colour, not color; aes() lists the valid channels on error.
• Fill opacity defaults to 1 on geom-area, geom-ribbon, geom-polygon, geom-ellipse, and geom-mark; pass alpha: for translucency.
• stroke: accepts the native Typst 1.3pt + accent form (thickness and paint together); an explicit colour: wins over the embedded paint.
• Unknown stat, scale transform, oob, or theme() element names fail fast instead of silently rendering as identity.
• CSV string-numeric columns stay discrete; call as-numeric(data, "col") for a continuous scale.

Reference protocol

The API is pre-1.0; names and arguments change between releases. Do not recall a geom, stat, scale, or argument from memory; confirm each against the machine-readable reference.

1. Index: https://m.canouil.dev/gribouille/llms.txt lists every page and its .llms.md.
2. Fetch the symbol's page, e.g., .../reference/geoms/geom-smooth.llms.md, .../reference/scales/scale-viridis-d.llms.md, .../reference/stats/stat-summary.llms.md. Every <page>.html has a sibling <page>.llms.md.
3. Use only the arguments, defaults, and types documented there.

Families under reference/: core, geoms, stats, scales, coord, facets, positions, guides, labels, themes, helpers, datasets. Tutorials: get-started/, guides/, examples/.

Validate

Compile before claiming success:

typst compile plot.typ

Errors follow the shape <scope>: <problem>; got <value>. <hint>; read the hint, then re-check the argument against its .llms.md page.