2d:null 2e:["$","title",null,{"children":"Sankey Diagram | anndawn | Observable"}] 33:T7a2,chart = { const svg = d3.create("svg") .attr("viewBox", [0, 0, width, height]); const {nodes, links} = sankey(data); svg.append("g") .attr("stroke", "#000") .selectAll("rect") .data(nodes) .join("rect") .attr("x", d => d.x0) .attr("y", d => d.y0) .attr("height", d => d.y1 - d.y0) .attr("width", d => d.x1 - d.x0) .attr("fill", d => color(d.name)) .append("title") .text(d => `${d.name}\n${format(d.value)}`); const link = svg.append("g") .attr("fill", "none") .attr("stroke-opacity", 0.5) .selectAll("g") .data(links) .join("g") .style("mix-blend-mode", "multiply"); if (edgeColor === "path") { const gradient = link.append("linearGradient") .attr("id", d => (d.uid = DOM.uid("link")).id) .attr("gradientUnits", "userSpaceOnUse") .attr("x1", d => d.source.x1) .attr("x2", d => d.target.x0); gradient.append("stop") .attr("offset", "0%") .attr("stop-color", d => color(d.source.name)); gradient.append("stop") .attr("offset", "100%") .attr("stop-color", d => color(d.target.name)); } link.append("path") .attr("d", d3.sankeyLinkHorizontal()) .attr("stroke", d => edgeColor === "none" ? "#aaa" : edgeColor === "path" ? d.uid : edgeColor === "input" ? color(d.source.name) : color(d.target.name)) .attr("stroke-width", d => Math.max(1, d.width)); link.append("title") .text(d => `${d.source.name} → ${d.target.name}\n${format(d.value)}`); svg.append("g") .style("font", "10px sans-serif") .selectAll("text") .data(nodes) .join("text") .attr("x", d => d.x0 < width / 2 ? d.x1 + 6 : d.x0 - 6) .attr("y", d => (d.y1 + d.y0) / 2) .attr("dy", "0.35em") .attr("text-anchor", d => d.x0 < width / 2 ? "start" : "end") .text(d => d.name); return svg.node(); }34:[{"id":"48a1eacb052ecf625e82390ba115954b3920ef78747a7c7e4332708334ca4f8cdb0c12e4880e676e0f21121f070be4907256334345036a2c7d73660813e50720","href":"https://static.observableusercontent.com/files/48a1eacb052ecf625e82390ba115954b3920ef78747a7c7e4332708334ca4f8cdb0c12e4880e676e0f21121f070be4907256334345036a2c7d73660813e50720","name":"region_pd3@1.csv","type":"text/csv","lastModified":1582480822565.428,"size":56001}] 31:{"id":"00dadb762982a08a","slug":"sankey-diagram","title":"Sankey Diagram","thumbnail":"e7fab75299509115ba8f1b31259d2e161ecbd59300b2f2d940761d65a1d8fdc2","access_level":"public","create_time":"$D2020-02-23T17:40:25.815Z","update_time":"$D2020-06-09T21:28:17.329Z","view_time":null,"first_public_time":"$D2020-05-14T15:37:45.110Z","has_unpublished_edits":null,"fork":{"id":"99b2e903e7df3b0a","slug":"sankey-component","title":"Sankey diagram component","owner":{"id":"863951e3ebe4c0ae","login":"d3","name":"D3"}},"stars":1,"starred":false,"owner":{"type":"team","id":"08b25cc9d2cc09a6","login":"anndawn","name":"","avatar_url":"https://avatars-next.observableusercontent.com/a9bef462081f7a77e161e2b21c48a5ea6a7153836b0db2eb8a565396dcfc57c5","tier":"starter_2024"},"version":263,"publish_version":263,"role":null,"authored":false,"authors":[{"type":"individual","id":"b0fc265f2fad2840","login":"anndawn","name":"","avatar_url":"https://avatars-next.observableusercontent.com/a9bef462081f7a77e161e2b21c48a5ea6a7153836b0db2eb8a565396dcfc57c5","tier":null}],"members":[{"type":"individual","id":"b0fc265f2fad2840","login":"anndawn","name":"","avatar_url":"https://avatars-next.observableusercontent.com/a9bef462081f7a77e161e2b21c48a5ea6a7153836b0db2eb8a565396dcfc57c5","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":2,"collection":null,"type":"notebook","body":{"title":"Sankey Diagram","cells":[{"id":0,"value":"md`# Sankey Diagram\n\nThis [Sankey diagram](https://github.com/d3/d3-sankey) visualizes the flow of energy: *supplies* are on the left, and *demands* are on the right. Links show how varying amounts of energy are converted or transmitted before being consumed or lost.\n\nData: [Department of Energy & Climate Change](http://www.decc.gov.uk/en/content/cms/tackling/2050/calculator_on/calculator_on.aspx), [Tom Counsell](https://tamc.github.io/Sankey/)\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":160,"value":"viewof edgeColor = Object.assign(html``, {\n value: new URLSearchParams(html``.search).get(\"color\") || \"path\"\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":181,"value":"viewof align = Object.assign(html``, {\n value: new URLSearchParams(html``.search).get(\"align\") || \"justify\"\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":11,"value":"$33","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":22,"value":"sankey = {\n const sankey = d3.sankey()\n .nodeId(d => d.name)\n .nodeAlign(d3[`sankey${align[0].toUpperCase()}${align.slice(1)}`])\n .nodeWidth(15)\n .nodePadding(10)\n .extent([[1, 5], [width - 1, height - 5]]);\n return ({nodes, links}) => sankey({\n nodes: nodes.map(d => Object.assign({}, d)),\n links: links.map(d => Object.assign({}, d))\n });\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":13,"value":"format = {\n const f = d3.format(\",.0f\");\n return d => `${f(d)} TWh`;\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":16,"value":"color = {\n const color = d3.scaleOrdinal(d3.schemeCategory10);\n return name => color(name.replace(/ .*/, \"\"));\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":249,"value":"data = {\n const links = d3.csvParse(await FileAttachment(\"region_pd3@1.csv\").text(), d3.autoType);\n const nodes = Array.from(new Set(links.flatMap(l => [l.source, l.target])), name => ({name}));\n return {nodes, links};\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":95,"value":"width = 954","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":9,"value":"height = 2000","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":7,"value":"d3 = require(\"d3@5\", \"d3-sankey@0.12\")","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"}],"files":"$W34","stdlib":"1","titling":"auto"}} 32:"$31:body"