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trying to create x axis
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| <!DOCTYPE html> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <div id="chart0"></div> | |
| <script> | |
| var data = { | |
| "studyGuide": { | |
| "count": 20, | |
| "avgTime": "4 minutes and 32 seconds", | |
| "unitCount": [{ | |
| "name": "welcome", | |
| "count": 3 | |
| }, { | |
| "name": "1", | |
| "count": 10 | |
| }, { | |
| "name": "2", | |
| "count": 5 | |
| }, { | |
| "name": "3", | |
| "count": 12 | |
| }, { | |
| "name": "4", | |
| "count": 15 | |
| }, { | |
| "name": "5", | |
| "count": 2 | |
| }, { | |
| "name": "6", | |
| "count": 7 | |
| }] | |
| } | |
| }; | |
| var dataParsed = data['studyGuide']['unitCount']; | |
| // set the dimensions and margins of the graph | |
| var margin = { | |
| top: 20, | |
| right: 20, | |
| bottom: 30, | |
| left: 50 | |
| }, | |
| width = 960 - margin.left - margin.right, | |
| height = 500 - margin.top - margin.bottom; | |
| // set the ranges | |
| var x = d3.scalePoint().range([0, width]); | |
| var y = d3.scaleLinear().range([height, 0]); | |
| // define the line | |
| var valueline = d3.line() | |
| .x(function(d) { | |
| return x(d.name); | |
| }) | |
| .y(function(d) { | |
| return y(d.count); | |
| }); | |
| // 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("#chart0").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 + ")"); | |
| // format the data | |
| dataParsed.forEach(function(d) { | |
| d.count = +d.count; | |
| }); | |
| console.log("dataParsed", dataParsed); | |
| // Scale the range of the data | |
| x.domain(dataParsed.map(d => d.name)); | |
| y.domain([0, d3.max(dataParsed, function(d) { | |
| return d.count; | |
| })]); | |
| // Add the valueline path. | |
| svg.append("path") | |
| .data([dataParsed]) | |
| .attr("class", "line") | |
| .attr("d", valueline) | |
| .style("fill", "none") | |
| .style("stroke", "steelblue") | |
| .style("stroke-width", "2px"); | |
| // Add the X Axis | |
| svg.append("g") | |
| .attr("transform", "translate(0," + height + ")") | |
| .call(d3.axisBottom(x)); | |
| // Add the Y Axis | |
| svg.append("g") | |
| .call(d3.axisLeft(y)); | |
| </script> |
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