Published
Edited
Dec 12, 2020
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chart = {
const svg = d3.create("svg")
.attr("viewBox", [0, 0, width, height]);
svg.append("g")
.attr("fill", "steelblue")
.selectAll("rect")
.data(data)
.join("rect")
.attr("x", x(0))
.attr("y", (d, i) => y(i))
.attr("width", d => x(d.population) - x(0))
.attr("height", y.bandwidth());
svg.append("g")
.attr("fill", "white")
.attr("text-anchor", "end")
.attr("font-family", "sans-serif")
.attr("font-size", 12)
.selectAll("text")
.data(data)
.join("text")
.attr("x", d => x(d.population))
.attr("y", (d, i) => y(i) + y.bandwidth() / 2)
.attr("dy", "0.35em")
.attr("dx", -4)
.text(d => format(d.population))
.call(text => text.filter(d => x(d.population) - x(0) < 70) // short bars
.attr("dx", +4)
.attr("fill", "black")
.attr("text-anchor", "start"));

svg.append("g")
.call(xAxis);

svg.append("g")
.call(yAxis);

return svg.node();
}
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data = d3.json('https://api.census.gov/data/2014/pep/natstprc?get=STNAME,POP&DATE_=7&for=state')
.then(data => {
data.splice(0, 1);
data = data.map(d => ({
state: d[0],
population: +d[1]
}));
data = data.sort((a, b) => d3.descending(a.population, b.population));
return data;
})
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format = x.tickFormat(20, data.format)
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x = d3.scaleLinear()
.domain([0, d3.max(data, d => d.population)])
.range([margin.left, width - margin.right])
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y = d3.scaleBand()
.domain(d3.range(data.length))
.rangeRound([margin.top, height - margin.bottom])
.padding(0.1)
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xAxis = g => g
.attr("transform", `translate(0,${margin.top})`)
.call(d3.axisTop(x))
.call(g => g.select(".domain").remove())
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yAxis = g => g
.attr("transform", `translate(${margin.left},0)`)
.call(d3.axisLeft(y).tickFormat(i => data[i].state).tickSizeOuter(0))
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barHeight = 25
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height = Math.ceil((data.length + 0.1) * barHeight) + margin.top + margin.bottom
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margin = ({top: 30, right: 0, bottom: 10, left: 150})
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d3 = require("d3@6")
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