Replicates this work, mods the context and uses JSON as opposed to CSV
forked from brianbancroft's block: Double Line graph using JSON
Created
December 16, 2019 14:39
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Double Line graph using JSON
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| license: mit |
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| [ | |
| { | |
| "date": "1-May-12", | |
| "close": 53.13, | |
| "open": 3.41 | |
| }, { | |
| "date": "30-Apr-12", | |
| "close": 54.12, | |
| "open": 4.12 | |
| }, { | |
| "date": "27-Apr-12", | |
| "close": 5.12, | |
| "open": 2.65 | |
| }, { | |
| "date": "26-Apr-12", | |
| "close": 55.415, | |
| "open": 5.65 | |
| }, { | |
| "date": "25-Apr-12", | |
| "close": 65.12, | |
| "open": 6.12 | |
| }, { | |
| "date": "24-Apr-12", | |
| "close": 75.12, | |
| "open": 7.12 | |
| }, { | |
| "date": "23-Apr-12", | |
| "close": 85.65, | |
| "open": 8.50 | |
| }, { | |
| "date": "20-Apr-12", | |
| "close": "", | |
| "open": 9.6 | |
| }, { | |
| "date": "19-Apr-12", | |
| "close": 95.25, | |
| "open": 10.87 | |
| }, { | |
| "date": "18-Apr-12", | |
| "close": 105.645, | |
| "open": 11.54 | |
| }, { | |
| "date": "17-Apr-12", | |
| "close": 104.841, | |
| "open": 12.98 | |
| }, { | |
| "date": "16-Apr-12", | |
| "close": 204.958, | |
| "open": 14.01 | |
| }, { | |
| "date": "13-Apr-12", | |
| "close": 154.9, | |
| "open": 15.55 | |
| }, { | |
| "date": "12-Apr-12", | |
| "close": 210.6, | |
| "open": 18.564 | |
| }, { | |
| "date": "11-Apr-12", | |
| "close": 220.56, | |
| "open": 19.54 | |
| }, { | |
| "date": "10-Apr-12", | |
| "close": 230.98, | |
| "open": 20.54 | |
| }, { | |
| "date": "9-Apr-12", | |
| "close": 248.984, | |
| "open": 21.95 | |
| }, { | |
| "date": "5-Apr-12", | |
| "close": 260.4948, | |
| "open": 20.98 | |
| }, { | |
| "date": "4-Apr-12", | |
| "close": 250.94, | |
| "open": 22.48 | |
| }, { | |
| "date": "3-Apr-12", | |
| "close": 310.65, | |
| "open": 23.97 | |
| }, { | |
| "date": "2-Apr-12", | |
| "close": 350.494, | |
| "open": 24.8974 | |
| }, { | |
| "date": "30-Mar-12", | |
| "close": 365.145, | |
| "open": 29.94 | |
| }, { | |
| "date": "29-Mar-12", | |
| "close": 145.564, | |
| "open": 41.54 | |
| }, { | |
| "date": "28-Mar-12", | |
| "close": 370.23, | |
| "open": 30.12 | |
| }, { | |
| "date": "27-Mar-12", | |
| "close": 380.65, | |
| "open": 31.98 | |
| }, { | |
| "date": "26-Mar-12", | |
| "close": 390.64, | |
| "open": 3.94 | |
| } | |
| ] |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> /* set the CSS */ | |
| .line { | |
| fill: none; | |
| stroke: steelblue; | |
| stroke-width: 2px; | |
| } | |
| .axisSteelBlue text{ | |
| fill: steelblue; | |
| } | |
| .axisRed text{ | |
| fill: red; | |
| } | |
| </style> | |
| <body> | |
| <!-- load the d3.js library --> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script> | |
| // set the dimensions and margins of the graph | |
| var margin = {top: 20, right: 40, bottom: 30, left: 50}, | |
| width = 960 - margin.left - margin.right, | |
| height = 500 - margin.top - margin.bottom; | |
| // parse the date / time | |
| var parseTime = d3.timeParse("%d-%b-%y"); | |
| // set the ranges | |
| var x = d3.scaleTime().range([0, width]); | |
| var y0 = d3.scaleLinear().range([height, 0]); | |
| var y1 = d3.scaleLinear().range([height, 0]); | |
| // define the 1st line | |
| var valueline = d3.line() | |
| .x((d) => x(d.date)) | |
| .y((d) => y0(d.close)); | |
| // define the 2nd line | |
| var valueline2 = d3.line() | |
| .x((d) => x(d.date)) | |
| .y((d) => y1(d.open)); | |
| // append the svg obgect to the body of the page | |
| // appends a 'group' element to 'svg' | |
| // moves the 'group' element to the top left margin | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width + margin.left + margin.right) | |
| .attr("height", height + margin.top + margin.bottom) | |
| .append("g") | |
| .attr("transform", | |
| "translate(" + margin.left + "," + margin.top + ")"); | |
| // Get the data | |
| d3.json("data.json", (error, data) => { | |
| if (error) throw error; | |
| // format the data | |
| data.forEach((d) => { | |
| d.date = parseTime(d.date); | |
| d.close = +d.close; | |
| d.open = +d.open; | |
| }); | |
| // Scale the range of the data | |
| x.domain(d3.extent(data, d => d.date)); | |
| y0.domain([0, d3.max(data, d => Math.max(d.close))]); | |
| y1.domain([0, d3.max(data, d => Math.max(d.open))]); | |
| // Add the valueline path. | |
| svg.append("path") | |
| .data([data]) | |
| .attr("class", "line") | |
| .attr("d", valueline); | |
| // Add the valueline2 path. | |
| svg.append("path") | |
| .data([data]) | |
| .attr("class", "line") | |
| .style("stroke", "red") | |
| .attr("d", valueline2); | |
| // Add the X Axis | |
| svg.append("g") | |
| .attr("transform", "translate(0," + height + ")") | |
| .call(d3.axisBottom(x)); | |
| // Add the Y0 Axis | |
| svg.append("g") | |
| .attr("class", "axisSteelBlue") | |
| .call(d3.axisLeft(y0)); | |
| // Add the Y1 Axis | |
| svg.append("g") | |
| .attr("class", "axisRed") | |
| .attr("transform", "translate( " + width + ", 0 )") | |
| .call(d3.axisRight(y1)); | |
| }); | |
| </script> | |
| </body> |
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