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Edited
May 20, 2021
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Waffle Chart
Also listed in…
2. Charts
chart = {
const svg = d3.create("svg")
.style("cursor", "default")
.attr("viewBox", [0, 0, width, height]);
const g = svg.selectAll(".waffle")
.data(waffles)
.join("g")
.attr("class", "waffle");
if (!whole) {
const numPerRow = Math.floor(width / (waffleSize + padding.x));
g.attr("transform", (d, i) => {
const r = Math.floor(i / numPerRow);
const c = i - r * numPerRow;
return `translate(${c * (waffleSize + padding.x)},${r * (waffleSize + padding.y)})`
});
}
const cellSize = scale.bandwidth();
const half = cellSize / 2;
const cells = g.append("g")
.selectAll(options.shape)
.data(d => d)
.join(options.shape)
.attr("fill", d => d.index === -1 ? "#ddd" : color(d.index));
if (isRect) {
cells.attr("x", d => scale(d.x))
.attr("y", d => whole ? 0 : scale(d.y))
.attr("rx", 3).attr("ry", 3)
.attr("width", cellSize).attr("height", cellSize)
}
else {
cells.attr("cx", d => scale(d.x) + half)
.attr("cy", d => whole ? 0 : scale(d.y) + half)
.attr("r", half);
}
if (whole) {
cells.append("title").text(d => {
const cd = chartData[d.index];
return `${cd.territory}\n${toCurrency(cd.profit)} (${cd.ratio.toFixed(1)}%)`;
});
cells.transition()
.duration(d => d.y * 100)
.ease(d3.easeBounce)
.attr(isRect ? "y" : "cy", d => scale(d.y) + (isRect ? 0 : half));
svg.transition().delay(550)
.on("end", () => drawLegend(svg, cells));
}
else {
g.append("text")
.style("font-size", 20)
.style("font-weight", "bold")
.attr("dy", "1.5em")
.attr("text-anchor", "middle")
.attr("fill", (d, i) => color(i))
.attr("transform", `translate(${waffleSize / 2},0)`)
.text((d, i) => `${chartData[i].ratio.toFixed(0)}%`);
g.append("g")
.attr("transform", `translate(0,${waffleSize + padding.y / 2.5})`)
.call(g => g.append("text").text((d, i) => chartData[i].territory))
.call(g => g.append("text").attr("dy", "1em").text((d, i) => toCurrency(chartData[i].profit)));
}
return svg.node();
}
drawLegend = (svg, cells) => {
const legend = svg.selectAll(".legend")
.data(chartData.map(d => d.territory))
.join("g")
.attr("opacity", 1)
.attr("transform", (d, i) => `translate(${waffleSize + 20},${i * 30})`)
.on("mouseover", highlight)
.on("mouseout", restore);
legend.append("rect")
.attr("rx", 3).attr("ry", 3)
.attr("width", 30).attr("height", 20)
.attr("fill", (d, i) => color(i));
legend.append("text")
.attr("dx", 40)
.attr("alignment-baseline", "hanging")
.text((d, i) => `${d} (${chartData[i].ratio.toFixed(1)}%)`);
function highlight(e, d, restore) {
const i = legend.nodes().indexOf(e.currentTarget);
cells.transition().duration(500)
.attr("fill", d => d.index === i ? color(d.index) : "#ccc");
}
function restore() {
cells.transition().duration(500).attr("fill", d => color(d.index))
}
}
toCurrency = num => d3.format("$,.2f")(num)
color = d3.scaleOrdinal(d3.schemeTableau10)
.domain(sequence(chartData.length))
scale = d3.scaleBand()
.domain(sequence(10))
.range([0, waffleSize])
.padding(0.1)
sequence = (length) => Array.apply(null, {length: length}).map((d, i) => i);
whole = options.style === "whole"
isRect = options.shape === "rect"
chartData = {
const data = d3.csvParse(await FileAttachment("pbt.csv").text(), d3.autoType);
const total = data.reduce((a, b) => a + Math.abs(b.profit), 0);
return data.map(d => ({
territory: d.territory,
profit: d.profit,
ratio: d.profit / total * 100
}));
}
waffles = {
const array = [];
if (whole) {
const max = chartData.length;
let index = 0, curr = 1,
accu = Math.round(chartData[0].ratio), waffle = [];
for (let y = 9; y >= 0; y--)
for (let x = 0; x < 10; x ++) {
if (curr > accu && index < max) {
let r = Math.round(chartData[++index].ratio);
while(r === 0 && index < max) r = Math.round(chartData[++index].ratio);
accu += r;
}
waffle.push({x, y, index});
curr++;
}
array.push(waffle);
}
else {
chartData.map((d, i) => {
let curr = 0, waffle = [];
for (let y = 9; y >= 0; y--)
for(let x = 0; x < 10; x ++) {
waffle.push(({x, y, index: curr < Math.round(d.ratio) ? i : -1}));
curr++;
}
array.push(waffle);
});
}
return array;
}
width = 1024
height = 600
padding = ({x: 10, y: 40})
waffleSize = whole ? width < height ? width : height : 150;
import {form} from "@mbostock/form-input"
d3 = require("d3@6")
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