scale-linewidth-binned
Binned continuous linewidth scale.
Maps a numeric column onto a stroke-thickness range, but groups values into n-breaks bins for the legend. The mapping stays continuous so drawn strokes vary smoothly within each bin; only the legend swatches snap to bin centres.
Usage
scale-linewidth-binned(
n-breaks: 4,
breaks: auto,
range: (0.4pt, 1.4pt),
name: none,
limits: none,
oob: "drop",
labels: auto,
)Parameters
| Parameter | Default | Description |
|---|---|---|
n-breaks |
4 |
Number of legend bins. Ignored when breaks is set. |
breaks |
auto |
Array of bin edges for the legend, or auto to derive equal-width bins from n-breaks. Affects the legend only; the per-row mapping stays continuous. |
range |
(0.4pt, 1.4pt) |
Pair of Typst lengths (min, max) bounding the output thickness. |
name |
none |
Legend title. Overrides any name set via labels when both are present. |
limits |
none |
Pair (lo, hi) clipping the trained domain, or none. |
oob |
"drop" |
Out-of-range policy: "drop" (default) removes rows whose value falls outside limits; "squish" clamps continuous values to the nearest endpoint. |
labels |
auto |
Array of legend labels aligned with breaks, or auto. |
Returns
Scale object consumed by plot.
Examples
Linewidth grows with w, with the legend grouped into four bins.
#let d = (
(x: 1, y: 1, w: 1, g: "a"), (x: 2, y: 2, w: 1, g: "a"),
(x: 3, y: 3, w: 1, g: "a"), (x: 4, y: 4, w: 1, g: "a"),
(x: 1, y: 2, w: 4, g: "b"), (x: 2, y: 3, w: 4, g: "b"),
(x: 3, y: 4, w: 4, g: "b"), (x: 4, y: 5, w: 4, g: "b"),
(x: 1, y: 3, w: 7, g: "c"), (x: 2, y: 4, w: 7, g: "c"),
(x: 3, y: 5, w: 7, g: "c"), (x: 4, y: 6, w: 7, g: "c"),
(x: 1, y: 4, w: 10, g: "d"), (x: 2, y: 5, w: 10, g: "d"),
(x: 3, y: 6, w: 10, g: "d"), (x: 4, y: 7, w: 10, g: "d"),
)
#plot(
data: d,
mapping: aes(x: "x", y: "y", linewidth: "w", group: "g"),
layers: (geom-line(),),
scales: (scale-linewidth-binned(n-breaks: 4, range: (0.4pt, 2pt)),),
width: 10cm,
height: 6cm,
)
