Published
Edited
Oct 5, 2021
1 fork
1 star
chart = {
const svg = d3.create("svg")
.attr("viewBox", [0, 0, width, height])
.attr("font-family", "sans-serif")
.attr("font-size", 10);
svg.append("g")
.attr("text-anchor", "middle")
.selectAll("g")
.data(data.columns)
.join("g")
.attr("transform", (d, i) => `translate(${x(i)},20)`)
.call(g => g.append("text").text(d => d))
.call(g => g.append("line").attr("y1", 3).attr("y2", 9).attr("stroke", "currentColor"));
svg.append("g")
.attr("fill", "none")
.attr("stroke", "currentColor")
.selectAll("path")
.data(data)
.join("path")
.attr("d", d => line(d.values))
.attr("class", (d) => "item" + d.id)
.attr("stroke", (d) => d.values.reduce((a,b) => a-b) < 0 ? "green" : "red" );
svg.append("g")
.selectAll("g")
.data(data.columns)
.join("g")
.attr("transform", (d, i) => `translate(${x(i) + (i === 0 ? -padding : i === n - 1 ? padding : 0)},0)`)
.attr("text-anchor", (d, i) => i === 0 ? "end" : i === n - 1 ? "start" : "middle")
.selectAll("text")
.data((d, i) => d3.zip(
data.map(i === 0 ? d => `${d.name} ${formatNumber(d.values[i])}`
: i === n - 1 ? d => `${formatNumber(d.values[i])} ${d.name}`
: d => `${formatNumber(d.values[i])}`),
dodge(data.map(d => y(d.values[i]))),
data.map((d) => d.id)
))
.join("text")
.attr("class", (d) => "itemtexts item" + d[2])
.attr("y", ([, y]) => y)
.attr("dy", "0.35em")
.text(([text]) => text)
.call(halo);
svg
.selectAll("path")
.on("touchmove mouseover", (event, d) => {
svg
.selectAll(".item" + d.id)
.style("font-weight", "bold")
.style("stroke-width", 3);
})
.on("touchend mouseout", (event, d) => {
svg
.selectAll(".item" + d.id)
.style("font-weight", "normal")
.style("stroke-width", 1);
});
svg
.selectAll(".itemtexts")
.on("touchmove mouseover", (event, d) => {
svg
.selectAll(".item" + d[2])
.style("font-weight", "bold")
.style("stroke-width", 3);
})
.on("touchend mouseout", (event, d) => {
svg
.selectAll(".item" + d[2])
.style("font-weight", "normal")
.style("stroke-width", 1);
});
return svg.node();
}
data = {
const data = d3.csvParseRows(await FileAttachment("government-receipts-of-gdp.csv").text());
return Object.assign(data.slice(1).map(([name, ...values], index) => ({id: index, name, values: values.map(x => +x)})), {
columns: data[0].slice(1)
});
}
function dodge(positions, separation = 10, maxiter = 10, maxerror = 1e-1) {
positions = Array.from(positions);
let n = positions.length;
if (!positions.every(isFinite)) throw new Error("invalid position");
if (!(n > 1)) return positions;
let index = d3.range(positions.length);
for (let iter = 0; iter < maxiter; ++iter) {
index.sort((i, j) => d3.ascending(positions[i], positions[j]));
let error = 0;
for (let i = 1; i < n; ++i) {
let delta = positions[index[i]] - positions[index[i - 1]];
if (delta < separation) {
delta = (separation - delta) / 2;
error = Math.max(error, delta);
positions[index[i - 1]] -= delta;
positions[index[i]] += delta;
}
}
if (error < maxerror) break;
}
return positions;
}
n = data.columns.length
function halo(text) {
text.clone(true)
.each(function() { this.parentNode.insertBefore(this, this.previousSibling); })
.attr("fill", "none")
.attr("stroke", "white")
.attr("stroke-width", 4)
.attr("stroke-linejoin", "round");
}
line = d3.line()
.x((d, i) => x(i))
.y(y)
x = d3.scalePoint()
.domain(d3.range(n))
.range([margin.left, width - margin.right])
.padding(0.5)
y = d3.scaleLinear()
.domain(d3.extent(data.flatMap(d => d.values)))
.range([height - margin.bottom, margin.top])
formatNumber = y.tickFormat(100)
height = 600
margin = ({top: 40, right: 50, bottom: 10, left: 50})
padding = 3
slopecolor = d3
.scaleOrdinal()
.domain(["Percentage Increase", "Percertage Decrease"])
.range(["green", "red"])
.unknown("#ccc")
d3 = require("d3@6")
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