30:T8a1,function hcChart(opts) { const { height = 600, overlap = 9, scheme = "schemeBlues", data } = opts; const margin = { top: 30, right: 10, bottom: 0, left: 10 }; const step = 23; const color = i => d3[scheme][Math.max(3, overlap)][i + Math.max(0, 3 - overlap)]; const x = d3 .scaleUtc() .domain(d3.extent(data.dates)) .range([0, width]); const y = d3 .scaleLinear() .domain([0, d3.max(data.series, d => d3.max(d.values))]) .range([0, -overlap * step]); const xAxis = g => g .attr("transform", `translate(0,${margin.top})`) .call( d3 .axisTop(x) .ticks(width / 80) .tickSizeOuter(0) ) .call(g => g .selectAll(".tick") .filter(d => x(d) < margin.left || x(d) >= width - margin.right) .remove() ) .call(g => g.select(".domain").remove()); const area = d3 .area() .curve(d3.curveBasis) .defined(d => !isNaN(d)) .x((d, i) => x(data.dates[i])) .y0(0) .y1(d => y(d)); const svg = d3 .create("svg") .attr("viewBox", [0, 0, width, height]) .style("font", "10px sans-serif"); const g = svg .append("g") .selectAll("g") .data( data.series.map(d => Object.assign( { clipId: DOM.uid("clip"), pathId: DOM.uid("path") }, d ) ) ) .join("g") .attr("transform", (d, i) => `translate(0,${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,${(i + 1) * step})`) .attr("xlink:href", d => d.pathId.href); g.append("text") .attr("x", 4) .attr("y", step / 2) .attr("dy", "0.35em") .text(d => d.name); svg.append("g").call(xAxis); return svg.node(); }31:[{"id":"4ea24221b4db5e916702f2056cc385f5a14a80a44c7c304af89957c5cb6c5707cf64372ab0c4ecd9858375af251ce70e9eb397da832f22afc57faf2f54eec9f9","href":"https://static.observableusercontent.com/files/4ea24221b4db5e916702f2056cc385f5a14a80a44c7c304af89957c5cb6c5707cf64372ab0c4ecd9858375af251ce70e9eb397da832f22afc57faf2f54eec9f9","name":"traffic.csv","type":"text/csv","lastModified":1616439377741.56,"size":185565}] 2e:{"title":"Reusable HC plotting","cells":[{"id":0,"value":"md`# Reusable HC plotting\n\nA reusable version of horizon charts from [this](https://observablehq.com/@d3/horizon-chart) notebook from Mike.`","pinned":false,"hidden":false,"mode":"ojs"},{"id":285,"value":"viewof scheme = html``","pinned":false,"hidden":false,"mode":"ojs"},{"id":159,"value":"\nviewof overlap = {\n const form = html``;\n form.i.oninput = () => form.o.value = `${form.value = form.i.valueAsNumber} band${form.i.valueAsNumber === 1 ? \"\" : \"s\"}`;\n form.i.oninput();\n return form;\n}\n","pinned":false,"hidden":false,"mode":"ojs"},{"id":658,"value":"hcChart({ data: testingData, scheme, overlap })","pinned":true,"hidden":false,"mode":"ojs"},{"id":647,"value":"$30","pinned":true,"hidden":false,"mode":"ojs"},{"id":422,"value":"data.series","pinned":false,"hidden":false,"mode":"ojs"},{"id":426,"value":"data = testingData","pinned":false,"hidden":false,"mode":"ojs"},{"id":430,"value":"data.series[0]","pinned":true,"hidden":false,"mode":"ojs"},{"id":5,"value":"testingData = {\n const data = d3.csvParse(\n await FileAttachment(\"traffic.csv\").text(),\n d3.autoType\n );\n const dates = Array.from(d3.group(data, d => +d.date).keys()).sort(\n d3.ascending\n );\n return {\n dates: dates.map(d => new Date(d)),\n series: d3\n .groups(data, d => d.name)\n .map(([name, values]) => {\n const value = new Map(values.map(d => [+d.date, d.value]));\n return { name, values: dates.map(d => value.get(d)) };\n })\n };\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":7,"value":"d3 = require(\"d3@6\")","pinned":true,"hidden":false,"mode":"ojs"}],"files":"$W31","stdlib":"1","titling":"auto"}