chart = {
const svg = d3.create("svg")
.attr("viewBox", [0, 0, width, height]);
//.attr("style", "background-color: #212126");
const {nodes, links} = sankey(data);
svg.append("g")
.attr("stroke", "#212126")
.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", color)
.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");
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));
gradient.append("stop")
.attr("offset", "100%")
.attr("stop-color", d => color(d.target));
}
link.append("path")
.attr("d", d3.sankeyLinkHorizontal())
.attr("stroke", d => edgeColor === "none" ? "#aaa"
: edgeColor === "path" ? d.uid
: edgeColor === "input" ? color(d.source)
: color(d.target))
.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")
.attr("font-family", "sans-serif")
.attr("font-size", 16)
//.attr("fill", "#A6ACB0")
.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", "0.0em")
.attr("text-anchor", d => d.x0 < width / 2 ? "start" : "end")
.text(d => d.name + " (" + d3.format(",.0f")(d.sum) + ")");
return svg.node();
}
sankey = {
const sankey = d3.sankey()
.nodeId(d => d.name)
.nodeAlign(d3[`sankey${align[0].toUpperCase()}${align.slice(1)}`])
.nodeWidth(15)
.nodePadding(20)
.extent([[1, 5], [width - 1, height - 5]]);
return ({nodes, links}) => sankey({
nodes: nodes.map(d => Object.assign({}, d)),
links: links.map(d => Object.assign({}, d))
});
}
format = {
const format = d3.format(",.0f");
return data.units ? d => `${format(d)} ${data.units}` : format;
}
color = {
//const color = d3.scaleOrdinal(["#A88DF6", "#80C8FE", "#F98084", "#F99E71", "#ffe066"]);
const color = d3.scaleOrdinal(["#b3e6b3", "#d2a679", "#F98084", "#a6a6a6", "#805af2" ]);
//return d => color(d.category === undefined ? d.name : d.category);
return d=> color(d.code);
}
data = {
return {
nodes: [
{ name: "From 2xx", category: "from", code: "2xx", sum: 10642 },
{ name: "From 3xx", category: "from", code: "3xx", sum: 113 },
{ name: "From 4xx", category: "from", code: "4xx", sum: 16 },
{ name: "To 2xx", category: "to", code: "2xx", sum: 7443},
{ name: "To 3xx", category: "to", code: "3xx", sum: 2950 },
{ name: "To 4xx", category: "to", code: "4xx" , sum: 420},
{ name: "To 5xx", category: "to", code: "5xx" , sum: 8},
],
links: [
{ source: "From 2xx", target: "To 2xx", value: "7414" },
{ source: "From 2xx", target: "To 3xx", value: "2805" },
{ source: "From 2xx", target: "To 4xx", value: "415" },
{ source: "From 2xx", target: "To 5xx", value: "8" },
{ source: "From 3xx", target: "To 2xx", value: "13" },
{ source: "From 3xx", target: "To 3xx", value: "96" },
{ source: "From 3xx", target: "To 4xx", value: "4" },
{ source: "From 4xx", target: "To 3xx", value: "15" },
{ source: "From 4xx", target: "To 4xx", value: "1" },
],
units: "instances"
}
}
width = 600
height = 400
d3 = require("d3@5", "d3-sankey@0.12")
One platform to build and deploy the best data apps
Experiment and prototype by building visualizations in live JavaScript notebooks. Collaborate with your team and decide which concepts to build out.
Use Observable Framework to build data apps locally. Use data loaders to build in any language or library, including Python, SQL, and R.
Seamlessly deploy to Observable. Test before you ship, use automatic deploy-on-commit, and ensure your projects are always up-to-date.