30:T46d,function chart(data) { const svg = d3.create("svg") .attr("viewBox", [0, 0, width, height]) .style("font", "10px sans-serif"); const g = svg.append("g") .selectAll("g") .data(data.series.map(d => Object.assign({ clipId: DOM.uid("clip"), pathId: DOM.uid("path") }, d))) .join("g") .attr("transform", (d, i) => `translate(0,${i * (step + 1) + margin.top})`); g.append("clipPath") .attr("id", d => d.clipId.id) .append("rect") .attr("width", width) .attr("height", step); g.append("defs").append("path") .attr("id", d => d.pathId.id) .attr("d", d => area(d.values)); g.append("g") .attr("clip-path", d => d.clipId) .selectAll("use") .data(d => new Array(overlap).fill(d)) .join("use") .attr("fill", (d, i) => color(i)) .attr("transform", (d, i) => `translate(0,${(i + 1) * step})`) .attr("xlink:href", d => d.pathId.href); g.append("text") .attr("x", 4) .attr("y", step / 2) .attr("dy", "0.35em") .text(d => d.name); svg.append("g") .call(xAxis); return svg.node(); }31:[{"id":"4ea24221b4db5e916702f2056cc385f5a14a80a44c7c304af89957c5cb6c5707cf64372ab0c4ecd9858375af251ce70e9eb397da832f22afc57faf2f54eec9f9","href":"https://static.observableusercontent.com/files/4ea24221b4db5e916702f2056cc385f5a14a80a44c7c304af89957c5cb6c5707cf64372ab0c4ecd9858375af251ce70e9eb397da832f22afc57faf2f54eec9f9","name":"traffic.csv","type":"text/csv","lastModified":1586952661815.547,"size":185565}] 2e:{"title":"Horizon Chart","cells":[{"id":0,"value":"md`# Horizon Chart\n\nHorizon charts are an alternative to [ridgeline plots](/@d3/ridgeline-plot) and small-multiple area charts that allow greater precision for a given vertical space by using colored bands. These charts can also be used with diverging color scales to [differentiate positive and negative values](/@d3/horizon-chart-ii).\n\nData: [Moritz Klack](/@moklick)`","pinned":false,"hidden":false,"mode":"ojs"},{"id":285,"value":"viewof scheme = html``","pinned":false,"hidden":false,"mode":"ojs"},{"id":159,"value":"viewof overlap = {\n const form = html``;\n form.i.oninput = () => form.o.value = `${form.value = form.i.valueAsNumber} band${form.i.valueAsNumber === 1 ? \"\" : \"s\"}`;\n form.i.oninput();\n return form;\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":421,"value":"chart(data)","pinned":true,"hidden":false,"mode":"ojs"},{"id":14,"value":"$30","pinned":true,"hidden":false,"mode":"ojs"},{"id":43,"value":"height = data.series.length * (step + 1) + margin.top + margin.bottom","pinned":true,"hidden":false,"mode":"ojs"},{"id":45,"value":"margin = ({top: 30, right: 10, bottom: 0, left: 10})","pinned":true,"hidden":false,"mode":"ojs"},{"id":227,"value":"step = 23","pinned":true,"hidden":false,"mode":"ojs"},{"id":234,"value":"color = i => d3[scheme][Math.max(3, overlap)][i + Math.max(0, 3 - overlap)]","pinned":true,"hidden":false,"mode":"ojs"},{"id":38,"value":"x = d3.scaleUtc()\n .domain(d3.extent(data.dates))\n .range([0, width])","pinned":true,"hidden":false,"mode":"ojs"},{"id":67,"value":"y = d3.scaleLinear()\n .domain([0, d3.max(data.series, d => d3.max(d.values))])\n .range([0, -overlap * step])","pinned":true,"hidden":false,"mode":"ojs"},{"id":52,"value":"xAxis = g => g\n .attr(\"transform\", `translate(0,${margin.top})`)\n .call(d3.axisTop(x).ticks(width / 80).tickSizeOuter(0))\n .call(g => g.selectAll(\".tick\").filter(d => x(d) < margin.left || x(d) >= width - margin.right).remove())\n .call(g => g.select(\".domain\").remove())","pinned":true,"hidden":false,"mode":"ojs"},{"id":57,"value":"area = d3.area()\n .curve(d3.curveBasis)\n .defined(d => !isNaN(d))\n .x((d, i) => x(data.dates[i]))\n .y0(0)\n .y1(d => y(d))","pinned":true,"hidden":false,"mode":"ojs"},{"id":5,"value":"data = {\n const data = d3.csvParse(await FileAttachment(\"traffic.csv\").text(), d3.autoType);\n const dates = Array.from(d3.group(data, d => +d.date).keys()).sort(d3.ascending);\n return {\n dates: dates.map(d => new Date(d)),\n series: d3.groups(data, d => d.name).map(([name, values]) => {\n const value = new Map(values.map(d => [+d.date, d.value]));\n return {name, values: dates.map(d => value.get(d))};\n })\n };\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":7,"value":"d3 = require(\"d3@5\", \"d3-array@2\")","pinned":true,"hidden":false,"mode":"ojs"}],"files":"$W31","stdlib":"1","titling":"auto"}