chart = {
const arcs = pie(data);
const svg = d3.create("svg")
.attr("viewBox", [-width / 2, -height / 2, width, height]);
svg.append("g")
.attr("stroke", "white")
.selectAll("path")
.data(arcs)
.join("path")
.attr("fill", d => color(d.data.name))
.attr("d", arc)
.append("title")
.text(d => `${d.data.name}: ${d.data.value.toLocaleString()}`);
svg.append('g')
.attr('font-family','sans-serif')
.attr('font-size',12)
.attr('text-anchor','middle')
.selectAll('text')
.data(arcs)
.join('text')
.attr('transform',d=>`translate(${arc.centroid(d)})`)
.call(text=>text.append('tspan')
.attr('y','-0.4em')
.attr('font-weight','bold')
.text(d=>d.data.name))
.call(text=>text.filter(d=>(d.endAngle-d.startAngle)>0.25).append('tspan')
.attr('x',0)
.attr('y','0.7em')
.attr('fill-opacity',0.7)
.text(d=>d.data.value.toLocaleString())
);
return svg.node();
}
data = d3.csvParse(await FileAttachment("population-by-age.csv").text(), d3.autoType)
color = d3.scaleOrdinal()
.domain(data.map(d => d.name))
.range(d3.quantize(t => d3.interpolateSpectral(t * 0.8 + 0.1), data.length).reverse())
height = Math.min(width, 500)
arc = d3.arc()
.innerRadius(0)
.outerRadius(Math.min(width, height) / 2 - 1)
pie = d3.pie()
.sort(null)
.value(d => d.value)
d3 = require("d3@6")
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