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Plot.plot({
width: Math.max(width, 600),
marginBottom: 10,
projection: {
type: "azimuthal-equidistant",
rotate: [0, -90],
// Note: 1.22° corresponds to max. percentage (1.0), plus some room for the labels
domain: d3.geoCircle().center([0, 90]).radius(1.22)()
},
facet: {
data: points,
x: "fx",
y: "fy",
axis: null
},
marks: [
// Facet name
Plot.text(points, Plot.selectFirst({text: "name", frameAnchor: "bottom", fontWeight: "400", fontSize: 14})),
// grey discs
Plot.geo([1.0, 0.8, 0.6, 0.4, 0.2], {
geometry: (r) => d3.geoCircle().center([0, 90]).radius(r)(),
stroke: "black",
fill: "black",
strokeOpacity: 0.2,
fillOpacity: 0.02,
strokeWidth: 0.5
}),
// white axes
Plot.link(longitude.domain(), {
x1: longitude,
y1: 90 - 0.8,
x2: 0,
y2: 90,
stroke: "white",
strokeOpacity: 0.5,
strokeWidth: 2.5
}),
// tick labels
Plot.text([0.4, 0.6, 0.8], {
fx: 0, fy: 0,
x: 180,
y: (d) => 90 - d,
dx: 2,
textAnchor: "start",
text: (d) => ( d == 0.8 ? `${100 * d}th percentile` : `${100 * d}th`),
fill: "currentColor",
stroke: "white",
fontSize: 12
}),
// axes labels
Plot.text(longitude.domain(), {
fx: 0, fy: 0,
x: longitude,
y: 90 - 1.07,
text: Plot.identity,
lineWidth: 5,
fontSize: 12
}),
// axes labels, initials
Plot.text(longitude.domain(), {
fx: 0, fy: 0, facet: "exclude",
x: longitude,
y: 90 - 1.09,
text: d => d[0],
lineWidth: 5
}),
// areas
Plot.area(points, {
x1: ({ key }) => longitude(key),
y1: ({ value }) => 90 - value,
x2: 0,
y2: 90,
fill: "#4269D0",
fillOpacity: 0.25,
stroke: "#4269D0",
curve: "cardinal-closed"
}),
// points
Plot.dot(points, {
x: ({ key }) => longitude(key),
y: ({ value }) => 90 - value,
fill: "#4269D0",
stroke: "white"
}),
// interactive labels
Plot.text(
points,
Plot.pointer({
x: ({ key }) => longitude(key),
y: ({ value }) => 90 - value,
text: (d) => `${d.raw}\n(${Math.round(100 * d.value)}%)`,
textAnchor: "start",
dx: 4,
fill: "currentColor",
stroke: "white",
maxRadius: 10,
fontSize: 12
})
)
]
})
cars = FileAttachment("cars.csv").csv({typed: true})
points = {
const points = d3.sort(cars, d => d.Price).flatMap(({ name, ...values }, i) =>
Object.entries(values).map(([key, raw]) => ({
name,
key,
raw,
fx: (1 + i) % 4, // trellis (facets); we leave facet <0,0> empty for the legend
fy: Math.floor((1 + i) / 4)
}))
);
for (const [, g] of d3.group(points, d => d.key)) {
const m = d3.max(g, d => d.raw);
for (const d of g) d.value = d.raw / m;
}
return points;
}
longitude = d3.scalePoint(new Set(Plot.valueof(points, "key")), [180, -180]).padding(0.5).align(1)
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