geom-freqpoly
Frequency polygon: a line through per-bin counts of the x aesthetic.
Usage
geom-freqpoly(
mapping: none,
data: none,
bins: 30,
binwidth: none,
stroke: 0.8pt,
colour: auto,
alpha: auto,
linetype: auto,
position: "identity",
inherit-aes: true,
)Parameters
| Parameter | Default | Description |
|---|---|---|
mapping |
none |
Layer-specific aesthetic mapping built with aes. Must map x. |
data |
none |
Layer-specific dataset. Falls back to the plot data when none. |
bins |
30 |
Target number of bins when binwidth is none. |
binwidth |
none |
Fixed bin width. Overrides bins when set. |
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 |
auto |
Dash keyword. auto honours the linetype scale. |
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
Twelve-bin frequency polygon over a noisy series.
#let d = range(0, 40).map(i => (
x: calc.sin(i * 0.3) * 5 + i * 0.2,
))
#plot(
data: d,
mapping: aes(x: "x"),
layers: (geom-freqpoly(bins: 12, stroke: 1pt),),
width: 10cm,
height: 6cm,
)
Map colour to overlay frequency polygons per group on the same axes.
#let d = ()
#for grp in ("a", "b") {
for i in range(0, 40) {
d.push((x: calc.sin(i * 0.3) * 5 + i * 0.2 + (if grp == "b" { 2 } else { 0 }), grp: grp))
}
}
#plot(
data: d,
mapping: aes(x: "x", colour: "grp"),
layers: (geom-freqpoly(bins: 12, stroke: 1pt),),
width: 10cm,
height: 6cm,
)
