stat-bin-2d
Two-dimensional bin statistic: partition (x, y) into a rectangular grid and count rows per cell.
bins and binwidth accept either a scalar (applied to both axes) or an (x, y) pair. binwidth wins on each axis where both are set.
Usage
stat-bin-2d(
bins: 30,
binwidth: none,
)Parameters
| Parameter | Default | Description |
|---|---|---|
bins |
30 |
Scalar or (x, y) pair — target bin counts when binwidth is none. |
binwidth |
none |
Scalar or (x, y) pair — fixed bin widths. Overrides bins per axis. |
Returns
Statistic object with name: "bin_2d".
Outputs
x.y._count._density.xmin.xmax.ymin.ymax.
Examples
Drive geom-rect with the constructor form to bin a noisy scatter into a 20-by-20 grid coloured by count.
#let d = range(0, 400).map(i => (
x: calc.sin(i * 0.13) * 4,
y: calc.cos(i * 0.21) * 4,
))
#plot(
data: d,
mapping: aes(x: "x", y: "y"),
layers: (geom-rect(stat: stat-bin-2d(bins: 20)),),
scales: (scale-fill-viridis-c(),),
width: 10cm,
height: 6cm,
)
