guide-axis-theta
Customise the theta (angular) axis under coord-radial.
The returned spec carries customisation only; it is bound to the theta axis when passed through guides as theta: guide-axis-theta(...), and applied by the radial axis renderer. When bound the renderer draws an outer axis arc spanning the active theta range; without it the radial axis remains spoke-only. The major tick marks need no guide: they follow the axis-ticks theme surface, as they do on a cartesian axis.
Usage
guide-axis-theta(
angle: 0,
minor-ticks: false,
cap: "none",
)Parameters
| Parameter | Default | Description |
|---|---|---|
angle |
0 |
Tick-label rotation in degrees: 0 horizontal, 45 readable diagonal, 90 vertical. |
minor-ticks |
false |
Whether to draw short tick marks at half-step positions between major theta breaks, on the axis-ticks-minor theme surface. |
cap |
"none" |
Where to trim the axis arc: "none" (full sweep), "both", "upper", or "lower". |
Returns
Guide dictionary tagged kind: "guide", consumed by guides.
Examples
Rotate theta tick labels on a radar plot. The arc and the tick marks read the axis-line and axis-ticks theme surfaces, which theme-minimal blanks, so this turns them back on.
#let d = (
(axis: "speed", value: 4),
(axis: "comfort", value: 3),
(axis: "range", value: 5),
(axis: "boot", value: 2),
)
#plot(
data: d,
mapping: aes(x: "axis", y: "value"),
layers: (geom-col(),),
coord: coord-radial(),
guides: guides(theta: guide-axis-theta(angle: 30, minor-ticks: true)),
theme: theme-minimal(
axis-line: element-line(stroke: 0.5pt),
axis-ticks: element-tick(length: 0.15cm),
),
width: 8cm,
height: 8cm,
)
