geom-qq
Q-Q point layer: sorted sample versus theoretical quantile.
The sample aesthetic selects the column to compare against the chosen reference distribution. When sample is absent the layer falls back to y so simple aes(y: ...) plots also work. Colour, fill, shape, and alpha can be set or mapped through aes.
Usage
geom-qq(
mapping: none,
data: none,
size: auto,
stroke: none,
fill: auto,
colour: auto,
alpha: auto,
shape: auto,
distribution: "normal",
position: "identity",
inherit-aes: true,
)Parameters
| Parameter | Default | Description |
|---|---|---|
mapping |
none |
Layer-specific aesthetic mapping built with aes. Falls back to the plot mapping when none. |
data |
none |
Layer-specific dataset. Falls back to the plot data when none. |
size |
auto |
Marker size (a Typst length). |
stroke |
none |
Marker stroke; none means no outline. |
fill |
auto |
Marker fill colour. auto resolves via the colour scale or a neutral default. |
colour |
auto |
Fixed marker outline colour. auto resolves via the colour scale, falling back to the theme ink. Only takes effect when stroke is non-zero. |
alpha |
auto |
Marker opacity in [0, 1]. |
shape |
auto |
Marker shape keyword. auto honours the shape scale. |
distribution |
"normal" |
Reference distribution name; one of "normal" (default), "uniform", "exponential". |
position |
"identity" |
Position adjustment name. Usually "identity". |
inherit-aes |
true |
Whether to merge the plot-level mapping into this layer’s mapping. |
Returns
Layer dictionary consumed by plot.
Examples
Simple Q-Q against a normal reference, mapping y only.
#let d = (1, 2, 3, 4, 5).map(v => (v: v))
#plot(
data: d,
mapping: aes(y: "v"),
layers: (geom-qq(),),
width: 10cm,
height: 6cm,
)
Switch distribution to "uniform" to compare against a different reference.
#let d = range(1, 21).map(i => (v: i))
#plot(
data: d,
mapping: aes(y: "v"),
layers: (geom-qq(distribution: "uniform"),),
width: 10cm,
height: 6cm,
)
