Visualization toolmaker. Founder @observablehq. Creator @d3. Former @nytgraphics. Pronounced BOSS-tock.
chart = {
const svg = d3.create("svg")
.attr("viewBox", [0, 0, size, size]);
const circle = svg.selectAll("circle")
.data(pack(data).descendants().slice(1))
.join("circle")
.attr("r", d => d.r)
.attr("cx", d => d.x)
.attr("cy", d => d.y);
circle.filter(d => d.data)
.attr("fill", d => color(d.data.radius))
.append("title")
.text(d => `${d.data.name}
Planet radius: ${d.data.radius} EU
Star distance: ${isNaN(d.data.distance) ? "N/A" : `${d.data.distance} pc`}`);
circle.filter(d => d.children)
.attr("fill", "none")
.attr("stroke", "#000")
.attr("stroke-width", 1.5);
return svg.node();
}
pack = {
const pack = d3.pack().size([size, size]).padding(5);
const planets = [{children: data.filter(d => d.distance === 0)}];
const exoplanets = data.filter(d => d.distance !== 0);
const root = {children: planets.concat(exoplanets)};
return data => {
return pack(d3.hierarchy(root)
.sum(d => d.radius * d.radius)
.sort((a, b) => {
return !a.children - !b.children
|| isNaN(a.data.distance) - isNaN(b.data.distance)
|| a.data.distance - b.data.distance;
}));
};
}
size = 954
color = d3.scaleQuantize()
.domain(d3.extent(data, d => d.radius))
.range(["#156b87", "#876315", "#543510", "#872815"])
data = d3.csvParse(await FileAttachment("exoplanets.csv").text(), d3.autoType)
d3 = require("d3@5")
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