scale-x-datetime
Continuous x scale that formats axis labels as datetimes.
Column values may be numeric seconds since 2000-01-01T00:00:00 or ISO-8601 strings of the form YYYY-MM-DDTHH:MM[:SS] or YYYY-MM-DD HH:MM[:SS]. Each break is converted via datetime(year: 2000, month: 1, day: 1, hour: 0, minute: 0, second: 0) + duration(seconds: int(n)) and rendered with dt.display(date-format).
Usage
scale-x-datetime(
name: none,
limits: none,
oob: "drop",
breaks: auto,
labels: auto,
expand: auto,
date-format: "[year]-[month repr:numerical]-[day] [hour]:[minute]",
)Parameters
| Parameter | Default | Description |
|---|---|---|
name |
none |
Axis title. Overrides any name set via labels when both are present. |
limits |
none |
Pair (lo, hi) clipping the trained domain (numeric seconds since the epoch or ISO-8601 strings; either side may be auto), or none for automatic limits. |
oob |
"drop" |
Out-of-range policy: "drop" (default) removes rows whose value falls outside limits; "squish" clamps continuous values to the nearest endpoint. |
breaks |
auto |
Array of break values (numeric seconds since the epoch or ISO-8601 strings), or auto for automatic tick selection. |
labels |
auto |
Array of tick labels aligned with breaks, or auto. |
expand |
auto |
Padding around the domain. Accepts a ratio (5%) for proportional breathing room, a length (5pt) for canvas-space padding, a relative (5pt + 5%) for both, or a (lo, hi) 2-tuple for asymmetric padding, where either element may be auto to keep the per-scale default on that side. auto keeps the per-scale default; false collapses to zero. |
date-format |
"[year]-[month repr:numerical]-[day] [hour]:[minute]" |
Typst datetime.display pattern used for break labels. |
Returns
Scale object consumed by plot.
Examples
ISO-8601 datetime strings rendered with hour-and-minute ticks.
#let d = range(0, 6).map(i => (
x: "2024-04-01T0" + str(8 + i) + ":00",
y: i * i,
))
#plot(
data: d,
mapping: aes(x: "x", y: "y"),
layers: (geom-line(), geom-point(size: 2pt)),
scales: (scale-x-datetime(date-format: "[hour]:[minute]"),),
width: 12cm,
height: 6cm,
)
