geom-errorbar
Errorbar layer: vertical range with a horizontal cap at each end.
Mapping must provide x, ymin, ymax. The width parameter sets the cap span in x data units for continuous x, and as a fraction of the per-category slot width for discrete x.
Usage
geom-errorbar(
mapping: none,
data: none,
width: 0.4,
stroke: 0.8pt,
colour: auto,
alpha: auto,
linetype: "solid",
stat: "identity",
position: "identity",
inherit-aes: true,
)Parameters
| Parameter | Default | Description |
|---|---|---|
mapping |
none |
Layer-specific aesthetic mapping built with aes. Must map x, ymin, ymax. |
data |
none |
Layer-specific dataset. Falls back to the plot data when none. |
width |
0.4 |
Cap span. A Typst length sets the cap span directly in panel units; a number is interpreted as x data units for continuous x and a fraction of the slot width for discrete x. |
stroke |
0.8pt |
Line thickness (a Typst length). |
colour |
auto |
Fixed line colour. auto resolves via the colour scale. |
alpha |
auto |
Line opacity in [0, 1]. |
linetype |
"solid" |
Dash keyword. Defaults to "solid". |
stat |
"identity" |
Statistical transform name. Usually "identity". |
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
Vertical error bars with default cap span.
#let d = range(1, 6).map(i => (
x: i,
lo: i - 0.5,
hi: i + 0.5,
))
#plot(
data: d,
mapping: aes(x: "x", ymin: "lo", ymax: "hi"),
layers: (geom-errorbar(width: 0.4),),
width: 10cm,
height: 6cm,
)
Combine with geom-point at the central estimate to convey the uncertainty around it.
#let d = range(1, 6).map(i => (
x: i, y: i, lo: i - 0.5, hi: i + 0.5,
))
#plot(
data: d,
mapping: aes(x: "x", y: "y", ymin: "lo", ymax: "hi"),
layers: (
geom-errorbar(width: 0.3),
geom-point(size: 3pt),
),
width: 10cm,
height: 6cm,
)
