2f:T76d,viewof chart = { var data = d3.range(40).map(function(i) { return i % 5 ? {x: i / 39, y: (Math.sin(i / 3) + 2) / 4} : null; }); var margin = {top: 40, right: 40, bottom: 40, left: 40}, width = 960 - margin.left - margin.right, height = 500 - margin.top - margin.bottom; var x = d3.scaleLinear() .range([0, width]); var y = d3.scaleLinear() .range([height, 0]); var line = d3.line() .defined(function(d) { return d; }) .x(function(d) { return x(d.x); }) .y(function(d) { return y(d.y); }); var area = d3.area() .defined(line.defined()) .x(line.x()) .y1(line.y()) .y0(y(0)); var svg = d3.create("svg") .datum(data) .attr("width", width + margin.left + margin.right) .attr("height", height + margin.top + margin.bottom) .append("g") .attr("transform", "translate(" + margin.left + "," + margin.top + ")"); svg.append("path") .attr("class", "area") .style("fill", "lightsteelblue") .attr("d", area); svg.append("g") .attr("class", "x axis") .attr("transform", "translate(0," + height + ")") .call(d3.axisBottom(x)); svg.append("g") .attr("class", "y axis") .call(d3.axisLeft(y)); svg.append("path") .attr("class", "line") .style("fill", "none") .style("stroke", "steelblue") .style("stroke-width", "1.5px") .attr("d", line); svg.selectAll(".dot") .data(data.filter(function(d) { return d; })) .enter().append("circle") .style("fill", "white") .style("stroke", "steelblue") .style("stroke-width", "1.5px") .attr("class", "dot") .attr("cx", line.x()) .attr("cy", line.y()) .attr("r", 3.5); svg.node().parentNode.value = data; svg.node().parentNode.dispatchEvent(new Event("input")); return svg.node().parentNode; }30:[] 2d:{"title":"d3-area","cells":[{"id":0,"value":"# d3-area\n\nhttps://developer.mozilla.org/en-US/docs/Web/SVG/Tutorial/Positions","pinned":false,"hidden":false,"mode":"md"},{"id":25,"value":"### line","pinned":false,"hidden":false,"mode":"md"},{"id":146,"value":"data = [[10, 60], [40, 90], [60, 10], [190, 10]]","pinned":true,"hidden":false,"mode":"ojs"},{"id":113,"value":"svg``","pinned":true,"hidden":false,"mode":"ojs"},{"id":8,"value":"p = d3.line()(data)","pinned":true,"hidden":false,"mode":"ojs"},{"id":29,"value":"### area\n\n* [d3.area](https://github.com/d3/d3-shape#areas) API reference -- github\n* An area is defined by two bounding lines\n* Typically, the two lines share the same x-values (x0 = x1), differing only in y-value (y0 and y1)\n* Most commonly, y0 is defined as a constant representing zero\n* The first line (the topline) is defined by x1 and y1 and is rendered first;\n* the second line (the baseline) is defined by x0 and y0 and is rendered second\n* with the points in reverse order\n* With a curveLinear curve, this produces a clockwise polygon.","pinned":false,"hidden":false,"mode":"md"},{"id":10,"value":"a = d3.area()(data)","pinned":true,"hidden":false,"mode":"ojs"},{"id":14,"value":"svg``","pinned":true,"hidden":false,"mode":"ojs"},{"id":150,"value":"{\n const svg = d3.create(\"svg\")\n .attr('width', 200)\n .attr('height', 100)\n .attr('viewBox', '0 0 200 100')\n\n svg.append(\"path\")\n .attr(\"d\", a)\n .style(\"stroke\", \"black\")\n .style(\"fill\", \"lightgray\")\n\n return svg.node()\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":36,"value":"### areaRadial\n\n* [d3.areaRadial](https://github.com/d3/d3-shape#areaRadial) constructs a new radial area generator with the default settings.\n* A radial area generator is equivalent to the standard Cartesian area generator, except the x and y accessors are replaced with angle and radius accessors.\n* Radial areas are always positioned relative to ⟨0,0⟩; use a transform to change the origin.\n* [d3.areaRadial](https://github.com/d3/d3-shape#areaRadial) API reference -- github","pinned":false,"hidden":false,"mode":"md"},{"id":178,"value":"radialData = [{theta: Math.PI / 8}, {theta: Math.PI/2}]","pinned":true,"hidden":false,"mode":"ojs"},{"id":38,"value":"r = d3.areaRadial()\n .angle(d => d.theta)\n .innerRadius(20)\n .outerRadius(30)\n .curve(d3.curveLinear)\n (radialData)\n","pinned":true,"hidden":false,"mode":"ojs"},{"id":41,"value":"svg``","pinned":true,"hidden":false,"mode":"ojs"},{"id":191,"value":"# d3.arc\n\n","pinned":false,"hidden":false,"mode":"md"},{"id":193,"value":"arc = d3.arc()\n .innerRadius(10)\n .outerRadius(40)\n .startAngle(0)\n .endAngle(Math.PI / 2)()","pinned":true,"hidden":false,"mode":"ojs"},{"id":196,"value":"svg``","pinned":true,"hidden":false,"mode":"ojs"},{"id":227,"value":"svg``","pinned":true,"hidden":false,"mode":"ojs"},{"id":217,"value":"arc2 = {\n return d3.arc()\n .innerRadius(10)\n .outerRadius(40)\n .startAngle(0)\n .endAngle((now / 2000 % 2) * Math.PI)()\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":136,"value":"# Area with Missing Data\n\nAdapted from the original bl.ock: [Area with Missing Data](https://bl.ocks.org/mbostock/3035090)","pinned":false,"hidden":false,"mode":"md"},{"id":167,"value":"chart","pinned":true,"hidden":false,"mode":"ojs"},{"id":118,"value":"$2f","pinned":true,"hidden":false,"mode":"ojs"},{"id":241,"value":"# d3-lineRadial demo\n\nThe [d3-lineRadial](https://observablehq.com/@d3/d3-lineradial) canvas example adapted to SVG...\n","pinned":false,"hidden":false,"mode":"md"},{"id":243,"value":"{\n const width = 300,\n svg = d3.select(DOM.svg(width, width));\n \n const step = (Math.PI * (-10 + ((now / 2000) % 20))) / 20;\n \n const spiral = Array.from({ length: 76 }, (_, i) => [step * i, 2 * i]);\n\n const path = svg.append(\"path\")\n .attr('fill', 'none').attr('stroke', 'black')\n .attr('transform', `translate(${[width / 2, width / 2]})`)\n\n path.datum(spiral).attr(\"d\", d3.lineRadial()(spiral));\n\n return svg.node();\n}","pinned":true,"hidden":false,"mode":"ojs"}],"files":"$W30","stdlib":"1","titling":"auto"}