Visualization toolmaker. Founder @observablehq. Creator @d3. Former @nytgraphics. Pronounced BOSS-tock.
Published
Edited
Feb 27, 2020
7 forks
19 stars
chart = {
const svg = d3.create("svg")
.attr("viewBox", [0, 0, 975, 610])
.attr("text-anchor", "middle")
.attr("font-family", "sans-serif")
.attr("font-size", 10);
svg.append("path")
.datum(topojson.feature(us, us.objects.nation))
.attr("fill", "#ddd")
.attr("d", path);
svg.append("path")
.datum(topojson.mesh(us, us.objects.states, (a, b) => a !== b))
.attr("fill", "none")
.attr("stroke", "white")
.attr("stroke-linejoin", "round")
.attr("d", path);
const legend = svg.append("g")
.attr("fill", "#777")
.attr("transform", "translate(925,608)")
.selectAll("g")
.data([1e6, 5e6, 15e6])
.join("g");
legend.append("circle")
.attr("fill", "none")
.attr("stroke", "#bbb")
.attr("cy", d => -radius(d))
.attr("r", radius);
legend.append("text")
.attr("y", d => -2 * radius(d))
.attr("dy", "1.3em")
.text(d3.format("~s"));
let bubble = svg.append("g")
.selectAll("g");
return Object.assign(svg.node(), {
update(year) {
const t = svg.transition()
.duration(delay)
.ease(d3.easeLinear);
bubble = bubble
.data(data.filter(d => d.year === year), d => d.id)
.join(
enter => enter.append("g")
.attr("transform", d => `translate(${path.centroid(d.feature)})`)
.call(g => g.append("circle")
.attr("fill", "brown")
.attr("fill-opacity", 0.5)
.attr("stroke", "currentColor")
.attr("r", 0))
.call(g => g.append("text")
.attr("dy", "0.35em")
.attr("fill-opacity", 0)
.attr("y", -2)
.text(d => d.feature.properties.name)
.call(text => text.append("tspan")
.style("font-variant-numeric", "tabular-nums")
.attr("x", 0)
.attr("y", 12)
.text(0))
.transition(t)
.attr("fill-opacity", 1)),
update => update,
exit => exit.call(bubble => bubble.transition(t)
.call(g => g.select("circle").attr("r", 0))
.call(g => g.select("text").attr("fill-opacity", 0))
.call(g => g.select("tspan").call(textTween, 0))
.remove())
);
bubble.select("circle").transition(t)
.attr("r", d => radius(d.value));
bubble.select("tspan").transition(t)
.call(textTween, d => d.value);
}
});
}
function textTween(text, valueof) {
if (typeof valueof !== "function") {
const value = +valueof;
valueof = () => value;
}
return text.textTween(function(d) {
const value = +this.textContent.replace(/,/g, "");
const i = d3.interpolateRound(value, valueof(d));
return t => formatValue(i(t));
});
}
chart.update(year)
delay = 750
data = {
const data = d3.tsvParse(await FileAttachment("population.tsv").text(), (d, i) => i === 0 ? null : d);
const years = data.columns.slice(1, -3).map(x => +x).reverse();
return Object.assign(d3.cross(data, years, (d, year) => ({id: d["FIPS code"], feature: states.get(d["FIPS code"]), year, value: +d[year].replace(/,/g, "")})).filter(d => !isNaN(d.value)).sort((a, b) => d3.descending(a.value, b.value)), {years});
}
states = new Map(us.objects.states.geometries.map(d => [d.id, topojson.feature(us, d)]))
radius = d3.scaleSqrt([0, 2e7], [0, 50])
path = d3.geoPath()
formatValue = d3.format(",d")
us = FileAttachment("states-albers-10m.json").json()
topojson = require("topojson-client@3")
d3 = require("d3@5")
import {Scrubber} from "@mbostock/scrubber"
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