A Marimekko Chart, inspired by Freakalytics. Thanks to Noah Iliinsky for the suggestion. Jason Davies has published an even-simpler interactive implementation using the “slice-dice” treemap layout algorithm!
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Marimekko Chart
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| license: gpl-3.0 | |
| redirect: https://observablehq.com/@d3/d3-marimekko-chart |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <title>Marimekko Chart</title> | |
| <style> | |
| body { | |
| font: 10px sans-serif; | |
| } | |
| rect { | |
| stroke: #000; | |
| } | |
| svg { | |
| shape-rendering: crispEdges; | |
| } | |
| </style> | |
| <body> | |
| <script src="//d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| var width = 960, | |
| height = 500, | |
| margin = 20; | |
| var x = d3.scale.linear() | |
| .range([0, width - 3 * margin]); | |
| var y = d3.scale.linear() | |
| .range([0, height - 2 * margin]); | |
| var z = d3.scale.category10(); | |
| var n = d3.format(",d"), | |
| p = d3.format("%"); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .append("g") | |
| .attr("transform", "translate(" + 2 * margin + "," + margin + ")"); | |
| d3.json("marimekko.json", function(error, data) { | |
| if (error) throw error; | |
| var offset = 0; | |
| // Nest values by segment. We assume each segment+market is unique. | |
| var segments = d3.nest() | |
| .key(function(d) { return d.segment; }) | |
| .entries(data); | |
| // Compute the total sum, the per-segment sum, and the per-market offset. | |
| // You can use reduce rather than reduceRight to reverse the ordering. | |
| // We also record a reference to the parent segment for each market. | |
| var sum = segments.reduce(function(v, p) { | |
| return (p.offset = v) + (p.sum = p.values.reduceRight(function(v, d) { | |
| d.parent = p; | |
| return (d.offset = v) + d.value; | |
| }, 0)); | |
| }, 0); | |
| // Add x-axis ticks. | |
| var xtick = svg.selectAll(".x") | |
| .data(x.ticks(10)) | |
| .enter().append("g") | |
| .attr("class", "x") | |
| .attr("transform", function(d) { return "translate(" + x(d) + "," + y(1) + ")"; }); | |
| xtick.append("line") | |
| .attr("y2", 6) | |
| .style("stroke", "#000"); | |
| xtick.append("text") | |
| .attr("y", 8) | |
| .attr("text-anchor", "middle") | |
| .attr("dy", ".71em") | |
| .text(p); | |
| // Add y-axis ticks. | |
| var ytick = svg.selectAll(".y") | |
| .data(y.ticks(10)) | |
| .enter().append("g") | |
| .attr("class", "y") | |
| .attr("transform", function(d) { return "translate(0," + y(1 - d) + ")"; }); | |
| ytick.append("line") | |
| .attr("x1", -6) | |
| .style("stroke", "#000"); | |
| ytick.append("text") | |
| .attr("x", -8) | |
| .attr("text-anchor", "end") | |
| .attr("dy", ".35em") | |
| .text(p); | |
| // Add a group for each segment. | |
| var segments = svg.selectAll(".segment") | |
| .data(segments) | |
| .enter().append("g") | |
| .attr("class", "segment") | |
| .attr("xlink:title", function(d) { return d.key; }) | |
| .attr("transform", function(d) { return "translate(" + x(d.offset / sum) + ")"; }); | |
| // Add a rect for each market. | |
| var markets = segments.selectAll(".market") | |
| .data(function(d) { return d.values; }) | |
| .enter().append("a") | |
| .attr("class", "market") | |
| .attr("xlink:title", function(d) { return d.market + " " + d.parent.key + ": " + n(d.value); }) | |
| .append("rect") | |
| .attr("y", function(d) { return y(d.offset / d.parent.sum); }) | |
| .attr("height", function(d) { return y(d.value / d.parent.sum); }) | |
| .attr("width", function(d) { return x(d.parent.sum / sum); }) | |
| .style("fill", function(d) { return z(d.market); }); | |
| }); | |
| </script> |
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| [ | |
| {"market": "Auburn, AL", "segment": "Almond lovers", "value": 3840}, | |
| {"market": "Auburn, AL", "segment": "Berry buyers", "value": 1920}, | |
| {"market": "Auburn, AL", "segment": "Carrots-n-more", "value": 960}, | |
| {"market": "Auburn, AL", "segment": "Delicious-n-new", "value": 400}, | |
| {"market": "Birmingham, AL", "segment": "Almond lovers", "value": 1600}, | |
| {"market": "Birmingham, AL", "segment": "Berry buyers", "value": 1440}, | |
| {"market": "Birmingham, AL", "segment": "Carrots-n-more", "value": 960}, | |
| {"market": "Birmingham, AL", "segment": "Delicious-n-new", "value": 400}, | |
| {"market": "Gainesville, FL", "segment": "Almond lovers", "value": 640}, | |
| {"market": "Gainesville, FL", "segment": "Berry buyers", "value": 960}, | |
| {"market": "Gainesville, FL", "segment": "Carrots-n-more", "value": 640}, | |
| {"market": "Gainesville, FL", "segment": "Delicious-n-new", "value": 400}, | |
| {"market": "Durham, NC", "segment": "Almond lovers", "value": 320}, | |
| {"market": "Durham, NC", "segment": "Berry buyers", "value": 480}, | |
| {"market": "Durham, NC", "segment": "Carrots-n-more", "value": 640}, | |
| {"market": "Durham, NC", "segment": "Delicious-n-new", "value": 400} | |
| ] |
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