from-theme
Pull a value from the resolved theme at render time.
path may be a dotted string ("axis-line.colour") or an array of keys (("axis-line", "colour")). Both forms are equivalent.
from-theme(...) resolves at layer prepare time, so the marker is replaced by a literal scalar before scale training and per-row rendering ever see it. Use it on aesthetic channels that have a fixed-value layer parameter (colour, fill, size, alpha, linewidth, stroke, shape, linetype).
Usage
from-theme(
path,
)Parameters
| Parameter | Default | Description |
|---|---|---|
path |
Dotted string or array of keys naming a theme entry. |
Returns
Late-binding marker consumed by aes.
Examples
Pin a layer’s stroke colour to the active theme’s ink.
#let d = (
(x: 1, y: 2),
(x: 2, y: 4),
(x: 3, y: 3),
)
#plot(
data: d,
mapping: aes(x: "x", y: "y", colour: from-theme("ink")),
layers: (geom-point(size: 3pt),),
width: 10cm,
height: 6cm,
)
