29:null 2a:["$","title",null,{"children":"Sankey diagram | Kelvin Lee | Observable"}] 2f:Tbfe,chart = { // Specify the dimensions of the chart. const width = 928; const height = 500; const format = d3.format(",.0f"); // Create a SVG container. const svg = d3.create("svg") .attr("width", width) .attr("height", height) .attr("viewBox", [0, 0, width, height]) .attr("style", "max-width: 100%; height: auto; font: 10px sans-serif;"); // Constructs and configures a Sankey generator. const sankey = d3.sankey() .nodeId(d => d.name) .nodeAlign(d3[nodeAlign]) // d3.sankeyLeft, etc. .nodeWidth(15) .nodePadding(10) .extent([[1, 5], [width - 1, height - 5]]); // Applies it to the data. We make a copy of the nodes and links objects // so as to avoid mutating the original. const {nodes, links} = sankey({ nodes: data.nodes.map(d => Object.assign({}, d)), links: data.links.map(d => Object.assign({}, d)) }); // Defines a color scale. const color = d3.scaleOrdinal(d3.schemeCategory10); // Creates the rects that represent the nodes. const rect = svg.append("g") .attr("stroke", "#000") .selectAll() .data(nodes) .join("rect") .attr("x", d => d.x0) .attr("y", d => d.y0) .attr("height", d => d.y1 - d.y0) .attr("width", d => d.x1 - d.x0) .attr("fill", d => color(d.category)); // Adds a title on the nodes. rect.append("title") .text(d => `${d.name}\n${format(d.value)} TWh`); // Creates the paths that represent the links. const link = svg.append("g") .attr("fill", "none") .attr("stroke-opacity", 0.5) .selectAll() .data(links) .join("g") .style("mix-blend-mode", "multiply"); // Creates a gradient, if necessary, for the source-target color option. if (linkColor === "source-target") { const gradient = link.append("linearGradient") .attr("id", d => (d.uid = DOM.uid("link")).id) .attr("gradientUnits", "userSpaceOnUse") .attr("x1", d => d.source.x1) .attr("x2", d => d.target.x0); gradient.append("stop") .attr("offset", "0%") .attr("stop-color", d => color(d.source.category)); gradient.append("stop") .attr("offset", "100%") .attr("stop-color", d => color(d.target.category)); } link.append("path") .attr("d", d3.sankeyLinkHorizontal()) .attr("stroke", linkColor === "source-target" ? (d) => d.uid : linkColor === "source" ? (d) => color(d.source.category) : linkColor === "target" ? (d) => color(d.target.category) : linkColor) .attr("stroke-width", d => Math.max(1, d.width)); link.append("title") .text(d => `${d.source.name} → ${d.target.name}\n${format(d.value)} TWh`); // Adds labels on the nodes. svg.append("g") .selectAll() .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(); }30:[{"id":"d6774e9422bd72369f195a30d3a6b33ff9d41676cff4d89c93511e1a458efb3cfd16cbb7ce3fecdd8dd2466121e10c9bfe57fd73c7520bf358d352a92b898614","href":"https://static.observableusercontent.com/files/d6774e9422bd72369f195a30d3a6b33ff9d41676cff4d89c93511e1a458efb3cfd16cbb7ce3fecdd8dd2466121e10c9bfe57fd73c7520bf358d352a92b898614","name":"energy.csv","type":"text/csv","lastModified":1729540118894.463,"size":2267},{"id":"be8017b2f9b8436948261ad523cc52ca53233ebf9dfc6b839d7050be742f687be1a9a5c4cd68a7048161ce0185b69f86a66308b036938beb6a767a0e71c3f1c9","href":"https://static.observableusercontent.com/files/be8017b2f9b8436948261ad523cc52ca53233ebf9dfc6b839d7050be742f687be1a9a5c4cd68a7048161ce0185b69f86a66308b036938beb6a767a0e71c3f1c9","name":"energy-2.csv","type":"text/csv","lastModified":1729540171303.111,"size":488},{"id":"63da5e5e0d1d34abaf285e530b6ebc2658f834bfea0de86ef4eb99a4f07e600959148d78c2307e7fc82f58a32c2e28e7f093eaae61772762939c31b14df7812a","href":"https://static.observableusercontent.com/files/63da5e5e0d1d34abaf285e530b6ebc2658f834bfea0de86ef4eb99a4f07e600959148d78c2307e7fc82f58a32c2e28e7f093eaae61772762939c31b14df7812a","name":"energy-2@4.csv","type":"text/csv","lastModified":1729541171462.001,"size":474},{"id":"2a5120bbccbb9a3f7b8d31b9fa5f25303054865ee2db142dafbd9b113876aab54f08a6bdb0cd1436f691fe6d392290b4360db17b28828dd7d870c74ac9182324","href":"https://static.observableusercontent.com/files/2a5120bbccbb9a3f7b8d31b9fa5f25303054865ee2db142dafbd9b113876aab54f08a6bdb0cd1436f691fe6d392290b4360db17b28828dd7d870c74ac9182324","name":"energy-2@5.csv","type":"text/csv","lastModified":1729541302543.765,"size":493},{"id":"bd574e85d9b34221142633877a96827eba29a7f1c59140ba0572f580996b833a5007122dae017b348e108ede481964f6a9ebb9d19ae24e996d25dd8b5e242357","href":"https://static.observableusercontent.com/files/bd574e85d9b34221142633877a96827eba29a7f1c59140ba0572f580996b833a5007122dae017b348e108ede481964f6a9ebb9d19ae24e996d25dd8b5e242357","name":"energy-2@6.csv","type":"text/csv","lastModified":1729541480204.326,"size":505},{"id":"c4c573a5154fad8463bfade1bd96ea09dd408d6ddf69fc03461f8d30ba94c40a3747fb5a9f6ccb0c8d3162128584da04328287e059d3fbf026498bd180dd5b01","href":"https://static.observableusercontent.com/files/c4c573a5154fad8463bfade1bd96ea09dd408d6ddf69fc03461f8d30ba94c40a3747fb5a9f6ccb0c8d3162128584da04328287e059d3fbf026498bd180dd5b01","name":"energy-2@7.csv","type":"text/csv","lastModified":1729541703613.666,"size":505},{"id":"76f63a4ea3f6dce98161b3164a970f9aaaefc48e8de8852ec27f2259c8841e3a7280c09a9f6a470a1860bc1e67f4dfa817b17d84da8082bc3fa6e76d7fd1743d","href":"https://static.observableusercontent.com/files/76f63a4ea3f6dce98161b3164a970f9aaaefc48e8de8852ec27f2259c8841e3a7280c09a9f6a470a1860bc1e67f4dfa817b17d84da8082bc3fa6e76d7fd1743d","name":"energy-2@8.csv","type":"text/csv","lastModified":1729542055813.992,"size":505},{"id":"7a7fa466dc20e67d36a55307b4fabbcb1d94baa3bf483b914bf362e5f72f16dfacddf4c447a7f6c3813b2f7378dd732a28b7458f1321a621dea6b3f8e6ea4142","href":"https://static.observableusercontent.com/files/7a7fa466dc20e67d36a55307b4fabbcb1d94baa3bf483b914bf362e5f72f16dfacddf4c447a7f6c3813b2f7378dd732a28b7458f1321a621dea6b3f8e6ea4142","name":"energy-2@9.csv","type":"text/csv","lastModified":1729542156204.455,"size":505}] 2d:{"id":"8357d746e1a76b46","slug":null,"title":"Sankey diagram","thumbnail":"54e11068c00bccd056ab16d9e7fd7d69b256c64667b953688873fb5e9dfd415a","access_level":"public","create_time":"$D2024-10-21T19:48:38.894Z","update_time":"$D2024-10-21T20:22:44.071Z","view_time":null,"first_public_time":"$D2024-10-21T19:48:38.894Z","fork":{"id":"3ecaa4aaa61dc833","slug":"sankey/2","title":"Sankey diagram","owner":{"id":"863951e3ebe4c0ae","login":"d3","name":"D3"}},"stars":0,"starred":false,"owner":{"type":"team","id":"029dcccf4595615d","login":"kelvinlee222","name":"Kelvin Lee","avatar_url":"https://avatars-next.observableusercontent.com/5fbd5e75b50982c8a542ff76646ebfe63b048fd0108abe2c5d9531292cc5675e","tier":"starter_2024"},"version":374,"publish_version":null,"role":null,"authored":false,"authors":[{"type":"individual","id":"c07392ac877423d0","login":"kelvinlee222","name":"Kelvin Lee","avatar_url":"https://avatars-next.observableusercontent.com/5fbd5e75b50982c8a542ff76646ebfe63b048fd0108abe2c5d9531292cc5675e","tier":null}],"members":[{"type":"team","id":"029dcccf4595615d","login":"kelvinlee222","name":"Kelvin Lee","avatar_url":"https://avatars-next.observableusercontent.com/5fbd5e75b50982c8a542ff76646ebfe63b048fd0108abe2c5d9531292cc5675e","tier":"starter_2024","role":"editor"},{"type":"individual","id":"c07392ac877423d0","login":"kelvinlee222","name":"Kelvin Lee","avatar_url":"https://avatars-next.observableusercontent.com/5fbd5e75b50982c8a542ff76646ebfe63b048fd0108abe2c5d9531292cc5675e","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"subscribed":null,"forks":0,"collection":null,"type":"notebook","body":{"title":"Sankey diagram","cells":[{"id":0,"value":"

Sankey diagram

D3 › Gallery